21523216760937 has 16 divisors (see below), whose sum is σ = 31886704615680. Its totient is φ = 14348605270896.

The previous prime is 21523216760861. The next prime is 21523216760971. The reversal of 21523216760937 is 73906761232512.

21523216760937 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 3 + 21 + 6 + 7 + 609 + 3 + 7 = 666.

It is not a de Polignac number, because 21523216760937 - 2²³ = 21523208372329 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21523216760237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3791313 + ... + 7577630.

It is an arithmetic number, because the mean of its divisors is an integer number (1992919038480).

Almost surely, 2^{21523216760937} is an apocalyptic number.

21523216760937 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21523216760937 is a deficient number, since it is larger than the sum of its proper divisors (10363487854743).

21523216760937 is a wasteful number, since it uses less digits than its factorization.

21523216760937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439069 (or 11439063 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 21523216760937 in words is "twenty-one trillion, five hundred twenty-three billion, two hundred sixteen million, seven hundred sixty thousand, nine hundred thirty-seven".