21881037585984 has 56 divisors (see below), whose sum is σ = 58490419679328. Its totient is φ = 7218486620160.

The previous prime is 21881037585917. The next prime is 21881037585989. The reversal of 21881037585984 is 48958573018812.

It is not an unprimeable number, because it can be changed into a prime (21881037585989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587423322 + ... + 587460569.

It is an arithmetic number, because the mean of its divisors is an integer number (1044471779988).

Almost surely, 2^{21881037585984} is an apocalyptic number.

21881037585984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21881037585984 is an abundant number, since it is smaller than the sum of its proper divisors (36609382093344).

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

21881037585984 is a wasteful number, since it uses less digits than its factorization.

21881037585984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174884003 (or 1174883993 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 69.

The spelling of 21881037585984 in words is "twenty-one trillion, eight hundred eighty-one billion, thirty-seven million, five hundred eighty-five thousand, nine hundred eighty-four".