21230366012664 has 64 divisors (see below), whose sum is σ = 53225235872640. Its totient is φ = 7056899556480.

The previous prime is 21230366012657. The next prime is 21230366012689. The reversal of 21230366012664 is 46621066303212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16099179 + ... + 17367909.

It is an arithmetic number, because the mean of its divisors is an integer number (831644310510).

Almost surely, 2^{21230366012664} is an apocalyptic number.

21230366012664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21230366012664 is an abundant number, since it is smaller than the sum of its proper divisors (31994869859976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21230366012664 is a wasteful number, since it uses less digits than its factorization.

21230366012664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270700 (or 1270696 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The spelling of 21230366012664 in words is "twenty-one trillion, two hundred thirty billion, three hundred sixty-six million, twelve thousand, six hundred sixty-four".