21954107160 has 96 divisors (see below), whose sum is σ = 73993505040. Its totient is φ = 5854425984.

The previous prime is 21954107117. The next prime is 21954107179. The reversal of 21954107160 is 6170145912.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1119607 + ... + 1139046.

Almost surely, 2^21954107160 is an apocalyptic number.

21954107160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21954107160 is an abundant number, since it is smaller than the sum of its proper divisors (52039397880).

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

21954107160 is a wasteful number, since it uses less digits than its factorization.

21954107160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258679 (or 2258663 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 21954107160 in words is "twenty-one billion, nine hundred fifty-four million, one hundred seven thousand, one hundred sixty".