21926117994384 has 80 divisors (see below), whose sum is σ = 58543880723648. Its totient is φ = 7065879215616.

The previous prime is 21926117994377. The next prime is 21926117994433. The reversal of 21926117994384 is 48349971162912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39038962 + ... + 39596625.

Almost surely, 2^{21926117994384} is an apocalyptic number.

21926117994384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21926117994384 is an abundant number, since it is smaller than the sum of its proper divisors (36617762729264).

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

21926117994384 is a wasteful number, since it uses less digits than its factorization.

21926117994384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78635792 (or 78635786 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 66.

The spelling of 21926117994384 in words is "twenty-one trillion, nine hundred twenty-six billion, one hundred seventeen million, nine hundred ninety-four thousand, three hundred eighty-four".