21374683528 has 32 divisors (see below), whose sum is σ = 44437691520. Its totient is φ = 9556488000.

The previous prime is 21374683501. The next prime is 21374683549. The reversal of 21374683528 is 82538647312.

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, 1985568 + ... + 1996303.

It is an arithmetic number, because the mean of its divisors is an integer number (1388677860).

Almost surely, 2^21374683528 is an apocalyptic number.

It is an amenable number.

21374683528 is an abundant number, since it is smaller than the sum of its proper divisors (23063007992).

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

21374683528 is a wasteful number, since it uses less digits than its factorization.

21374683528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981949 (or 3981945 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 49.

The spelling of 21374683528 in words is "twenty-one billion, three hundred seventy-four million, six hundred eighty-three thousand, five hundred twenty-eight".