21885056873742 has 16 divisors (see below), whose sum is σ = 46073803944960. Its totient is φ = 6911070591672.

The previous prime is 21885056873737. The next prime is 21885056873807. The reversal of 21885056873742 is 24737865058812.

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, 95987091438 + ... + 95987091665.

It is an arithmetic number, because the mean of its divisors is an integer number (2879612746560).

Almost surely, 2^{21885056873742} is an apocalyptic number.

21885056873742 is an abundant number, since it is smaller than the sum of its proper divisors (24188747071218).

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

21885056873742 is a wasteful number, since it uses less digits than its factorization.

21885056873742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191974183127.

The product of its (nonzero) digits is 180633600, while the sum is 66.

The spelling of 21885056873742 in words is "twenty-one trillion, eight hundred eighty-five billion, fifty-six million, eight hundred seventy-three thousand, seven hundred forty-two".