21371907376 has 20 divisors (see below), whose sum is σ = 41533180744. Its totient is φ = 10653667200.

The previous prime is 21371907371. The next prime is 21371907379. The reversal of 21371907376 is 67370917312.

It is not an unprimeable number, because it can be changed into a prime (21371907371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2012445 + ... + 2023036.

Almost surely, 2^21371907376 is an apocalyptic number.

It is an amenable number.

21371907376 is a deficient number, since it is larger than the sum of its proper divisors (20161273368).

21371907376 is a wasteful number, since it uses less digits than its factorization.

21371907376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035820 (or 4035814 counting only the distinct ones).

The product of its (nonzero) digits is 333396, while the sum is 46.

The spelling of 21371907376 in words is "twenty-one billion, three hundred seventy-one million, nine hundred seven thousand, three hundred seventy-six".