21310503572 has 24 divisors (see below), whose sum is σ = 38356923360. Its totient is φ = 10352219040.

The previous prime is 21310503523. The next prime is 21310503589. The reversal of 21310503572 is 27530501312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1922 + ... + 206457.

It is an arithmetic number, because the mean of its divisors is an integer number (1598205140).

Almost surely, 2^21310503572 is an apocalyptic number.

It is an amenable number.

21310503572 is a deficient number, since it is larger than the sum of its proper divisors (17046419788).

21310503572 is a wasteful number, since it uses less digits than its factorization.

21310503572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209111 (or 209109 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The spelling of 21310503572 in words is "twenty-one billion, three hundred ten million, five hundred three thousand, five hundred seventy-two".