21604623532375 has 32 divisors (see below), whose sum is σ = 29744824217472. Its totient is φ = 15565057056000.

The previous prime is 21604623532351. The next prime is 21604623532381. The reversal of 21604623532375 is 57323532640612.

It is not a de Polignac number, because 21604623532375 - 2²³ = 21604615143767 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162069387 + ... + 162202636.

It is an arithmetic number, because the mean of its divisors is an integer number (929525756796).

Almost surely, 2^{21604623532375} is an apocalyptic number.

21604623532375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21604623532375 is a deficient number, since it is larger than the sum of its proper divisors (8140200685097).

21604623532375 is a wasteful number, since it uses less digits than its factorization.

21604623532375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324272092 (or 324272082 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 49.

The spelling of 21604623532375 in words is "twenty-one trillion, six hundred four billion, six hundred twenty-three million, five hundred thirty-two thousand, three hundred seventy-five".