21770204856384 has 28 divisors (see below), whose sum is σ = 57600333683024. Its totient is φ = 7256734952064.

The previous prime is 21770204856353. The next prime is 21770204856391. The reversal of 21770204856384 is 48365840207712.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56693241622 + ... + 56693242005.

Almost surely, 2^{21770204856384} is an apocalyptic number.

21770204856384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21770204856384 is an abundant number, since it is smaller than the sum of its proper divisors (35830128826640).

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

21770204856384 is a wasteful number, since it uses less digits than its factorization.

21770204856384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113386483642 (or 113386483632 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 57.

The spelling of 21770204856384 in words is "twenty-one trillion, seven hundred seventy billion, two hundred four million, eight hundred fifty-six thousand, three hundred eighty-four".