21536753107625 has 24 divisors (see below), whose sum is σ = 31266091214280. Its totient is φ = 14768059269600.

The previous prime is 21536753107591. The next prime is 21536753107627. The reversal of 21536753107625 is 52670135763512.

21536753107625 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1829288710144 + 19707464397481 = 1352512^2 + 4439309^2 .

It is not a de Polignac number, because 21536753107625 - 2⁸ = 21536753107369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21536753107627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1758096170 + ... + 1758108419.

It is an arithmetic number, because the mean of its divisors is an integer number (1302753800595).

Almost surely, 2^{21536753107625} is an apocalyptic number.

21536753107625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21536753107625 is a deficient number, since it is larger than the sum of its proper divisors (9729338106655).

21536753107625 is an equidigital number, since it uses as much as digits as its factorization.

21536753107625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516204618 (or 3516204601 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 53.

The spelling of 21536753107625 in words is "twenty-one trillion, five hundred thirty-six billion, seven hundred fifty-three million, one hundred seven thousand, six hundred twenty-five".