Hello,

The number consists of two components, the first one is .pagin-style-2 .owl-dots .owl-dot:before http://prntscr.com/l9aq5w here is the code:

.pagin-style-2 .owl-dots .owl-dot:before {
    counter-increment: section;
    content: "0" counter(section);
    margin-right: 5px;
    font-size: 15px;
    font-weight: 600;
}

Here is the second: http://prntscr.com/l9ar57

.pagin-style-2 .owl-dots .owl-dot:after {
    content: "";
    height: 2px;
    width: 15px;
    background-color: currentColor;
    -webkit-transition: width .3s ease;
    transition: width .3s ease;
}

Best Regards