21057376502 has 8 divisors (see below), whose sum is σ = 33444068616. Its totient is φ = 9909353632.

The previous prime is 21057376493. The next prime is 21057376511. The reversal of 21057376502 is 20567375012.

It is an interprime number because it is at equal distance from previous prime (21057376493) and next prime (21057376511).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309667268 + ... + 309667335.

It is an arithmetic number, because the mean of its divisors is an integer number (4180508577).

Almost surely, 2^21057376502 is an apocalyptic number.

21057376502 is a deficient number, since it is larger than the sum of its proper divisors (12386692114).

21057376502 is a wasteful number, since it uses less digits than its factorization.

21057376502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619334622.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 21057376502 in words is "twenty-one billion, fifty-seven million, three hundred seventy-six thousand, five hundred two".