21976340352 has 64 divisors (see below), whose sum is σ = 58794758400. Its totient is φ = 7272728064.

The previous prime is 21976340327. The next prime is 21976340359. The reversal of 21976340352 is 25304367912.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21976340359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152488 + ... + 259239.

It is an arithmetic number, because the mean of its divisors is an integer number (918668100).

Almost surely, 2^21976340352 is an apocalyptic number.

It is an amenable number.

21976340352 is an abundant number, since it is smaller than the sum of its proper divisors (36818418048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21976340352 is a wasteful number, since it uses less digits than its factorization.

21976340352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411883 (or 411871 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 21976340352 in words is "twenty-one billion, nine hundred seventy-six million, three hundred forty thousand, three hundred fifty-two".