21072630015 has 24 divisors (see below), whose sum is σ = 38113976160. Its totient is φ = 10750094784.

The previous prime is 21072629993. The next prime is 21072630071. The reversal of 21072630015 is 51003627012.

It is a happy number.

21072630015 is a `hidden beast` number, since 2 + 10 + 7 + 2 + 630 + 0 + 15 = 666.

It is not a de Polignac number, because 21072630015 - 2¹² = 21072625919 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10178980 + ... + 10181049.

It is an arithmetic number, because the mean of its divisors is an integer number (1588082340).

Almost surely, 2^21072630015 is an apocalyptic number.

21072630015 is a deficient number, since it is larger than the sum of its proper divisors (17041346145).

21072630015 is a wasteful number, since it uses less digits than its factorization.

21072630015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20360063 (or 20360060 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The spelling of 21072630015 in words is "twenty-one billion, seventy-two million, six hundred thirty thousand, fifteen".