21264022054256 has 40 divisors (see below), whose sum is σ = 41262669496320. Its totient is φ = 10615596901056.

The previous prime is 21264022054243. The next prime is 21264022054307. The reversal of 21264022054256 is 65245022046212.

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, 60679961 + ... + 61029383.

It is an arithmetic number, because the mean of its divisors is an integer number (1031566737408).

Almost surely, 2^{21264022054256} is an apocalyptic number.

It is an amenable number.

21264022054256 is a deficient number, since it is larger than the sum of its proper divisors (19998647442064).

21264022054256 is a wasteful number, since it uses less digits than its factorization.

21264022054256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355293 (or 355287 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 21264022054256 in words is "twenty-one trillion, two hundred sixty-four billion, twenty-two million, fifty-four thousand, two hundred fifty-six".