21937782532715 has 16 divisors (see below), whose sum is σ = 30129020625600. Its totient is φ = 15021591446400.

The previous prime is 21937782532709. The next prime is 21937782532727. The reversal of 21937782532715 is 51723528773912.

It is a de Polignac number, because none of the positive numbers 2^k-21937782532715 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447046640 + ... + 447095709.

It is an arithmetic number, because the mean of its divisors is an integer number (1883063789100).

Almost surely, 2^{21937782532715} is an apocalyptic number.

21937782532715 is a deficient number, since it is larger than the sum of its proper divisors (8191238092885).

21937782532715 is an equidigital number, since it uses as much as digits as its factorization.

21937782532715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894143062.

The product of its digits is 44452800, while the sum is 62.

The spelling of 21937782532715 in words is "twenty-one trillion, nine hundred thirty-seven billion, seven hundred eighty-two million, five hundred thirty-two thousand, seven hundred fifteen".