21606362361 has 32 divisors (see below), whose sum is σ = 33117143040. Its totient is φ = 13907883600.

The previous prime is 21606362353. The next prime is 21606362369. The reversal of 21606362361 is 16326360612.

21606362361 is a `hidden beast` number, since 2 + 16 + 0 + 636 + 2 + 3 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21606362353) and next prime (21606362369).

It is not a de Polignac number, because 21606362361 - 2³ = 21606362353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21606362369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341656 + ... + 399926.

It is an arithmetic number, because the mean of its divisors is an integer number (1034910720).

Almost surely, 2^21606362361 is an apocalyptic number.

It is an amenable number.

21606362361 is a deficient number, since it is larger than the sum of its proper divisors (11510780679).

21606362361 is a wasteful number, since it uses less digits than its factorization.

21606362361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58754 (or 58748 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The spelling of 21606362361 in words is "twenty-one billion, six hundred six million, three hundred sixty-two thousand, three hundred sixty-one".