21262804052 has 12 divisors (see below), whose sum is σ = 42525608160. Its totient is φ = 9112630296.

The previous prime is 21262804033. The next prime is 21262804063. The reversal of 21262804052 is 25040826212.

21262804052 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379692902 + ... + 379692957.

It is an arithmetic number, because the mean of its divisors is an integer number (3543800680).

Almost surely, 2^21262804052 is an apocalyptic number.

It is an amenable number.

21262804052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21262804052 is a wasteful number, since it uses less digits than its factorization.

21262804052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759385870 (or 759385868 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 21262804052 in words is "twenty-one billion, two hundred sixty-two million, eight hundred four thousand, fifty-two".