21200523125 has 80 divisors (see below), whose sum is σ = 28462389120. Its totient is φ = 15751296000.

The previous prime is 21200523059. The next prime is 21200523139. The reversal of 21200523125 is 52132500212.

It is not a de Polignac number, because 21200523125 - 2¹⁶ = 21200457589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 21200523125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 93394262 + ... + 93394488.

It is an arithmetic number, because the mean of its divisors is an integer number (355779864).

Almost surely, 2^21200523125 is an apocalyptic number.

21200523125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21200523125 is a deficient number, since it is larger than the sum of its proper divisors (7261865995).

21200523125 is an equidigital number, since it uses as much as digits as its factorization.

21200523125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21200523125 in words is "twenty-one billion, two hundred million, five hundred twenty-three thousand, one hundred twenty-five".