21873573373540 has 48 divisors (see below), whose sum is σ = 52501601763072. Its totient is φ = 7498792918656.

The previous prime is 21873573373517. The next prime is 21873573373583. The reversal of 21873573373540 is 4537337537812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6010024 + ... + 8936863.

It is an arithmetic number, because the mean of its divisors is an integer number (1093783370064).

Almost surely, 2^{21873573373540} is an apocalyptic number.

21873573373540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21873573373540 is an abundant number, since it is smaller than the sum of its proper divisors (30628028389532).

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

21873573373540 is a wasteful number, since it uses less digits than its factorization.

21873573373540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14957356 (or 14957354 counting only the distinct ones).

The product of its (nonzero) digits is 44452800, while the sum is 58.

The spelling of 21873573373540 in words is "twenty-one trillion, eight hundred seventy-three billion, five hundred seventy-three million, three hundred seventy-three thousand, five hundred forty".