21264269765948 has 24 divisors (see below), whose sum is σ = 40687896627840. Its totient is φ = 9643559897520.

The previous prime is 21264269765927. The next prime is 21264269765953. The reversal of 21264269765948 is 84956796246212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550412186 + ... + 550450817.

It is an arithmetic number, because the mean of its divisors is an integer number (1695329026160).

Almost surely, 2^{21264269765948} is an apocalyptic number.

It is an amenable number.

21264269765948 is a deficient number, since it is larger than the sum of its proper divisors (19423626861892).

21264269765948 is a wasteful number, since it uses less digits than its factorization.

21264269765948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100863457 (or 1100863455 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 71.

The spelling of 21264269765948 in words is "twenty-one trillion, two hundred sixty-four billion, two hundred sixty-nine million, seven hundred sixty-five thousand, nine hundred forty-eight".