21600373761 has 48 divisors (see below), whose sum is σ = 32809271040. Its totient is φ = 14199267600.

The previous prime is 21600373733. The next prime is 21600373793. The reversal of 21600373761 is 16737300612.

21600373761 is a `hidden beast` number, since 216 + 0 + 0 + 373 + 76 + 1 = 666.

It is not a de Polignac number, because 21600373761 - 2¹¹ = 21600371713 is a prime.

It is a super-2 number, since 2×21600373761² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21600373061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20551686 + ... + 20552736.

It is an arithmetic number, because the mean of its divisors is an integer number (683526480).

Almost surely, 2^21600373761 is an apocalyptic number.

It is an amenable number.

21600373761 is a deficient number, since it is larger than the sum of its proper divisors (11208897279).

21600373761 is a wasteful number, since it uses less digits than its factorization.

21600373761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The spelling of 21600373761 in words is "twenty-one billion, six hundred million, three hundred seventy-three thousand, seven hundred sixty-one".