21174399568320 has 112 divisors (see below), whose sum is σ = 67304514705408. Its totient is φ = 5640140477440.

The previous prime is 21174399568261. The next prime is 21174399568367. The reversal of 21174399568320 is 2386599347112.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 11581776 + ... + 13284815.

It is a 1-persistent number, because it is pandigital, but 2⋅21174399568320 = 42348799136640 is not.

Almost surely, 2^{21174399568320} is an apocalyptic number.

21174399568320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21174399568320 is an abundant number, since it is smaller than the sum of its proper divisors (46130115137088).

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

21174399568320 is a wasteful number, since it uses less digits than its factorization.

21174399568320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24867498 (or 24867488 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 21174399568320 in words is "twenty-one trillion, one hundred seventy-four billion, three hundred ninety-nine million, five hundred sixty-eight thousand, three hundred twenty".