21633572900072 has 32 divisors (see below), whose sum is σ = 46362072069120. Its totient is φ = 9270648072000.

The previous prime is 21633572899949. The next prime is 21633572900101. The reversal of 21633572900072 is 27000927533612.

It is a super-2 number, since 2×21633572900072² (a number of 27 digits) contains 22 as substring.

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, 17806088 + ... + 18982199.

It is an arithmetic number, because the mean of its divisors is an integer number (1448814752160).

Almost surely, 2^{21633572900072} is an apocalyptic number.

It is an amenable number.

21633572900072 is an abundant number, since it is smaller than the sum of its proper divisors (24728499169048).

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

21633572900072 is a wasteful number, since it uses less digits than its factorization.

21633572900072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36798801 (or 36798797 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 21633572900072 in words is "twenty-one trillion, six hundred thirty-three billion, five hundred seventy-two million, nine hundred thousand, seventy-two".