21612962160 has 80 divisors (see below), whose sum is σ = 74444654880. Its totient is φ = 5763456000.

The previous prime is 21612962159. The next prime is 21612962183. The reversal of 21612962160 is 6126921612.

21612962160 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 29 + 621 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 5000841 + ... + 5005160.

It is an arithmetic number, because the mean of its divisors is an integer number (930558186).

Almost surely, 2^21612962160 is an apocalyptic number.

21612962160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21612962160 is an abundant number, since it is smaller than the sum of its proper divisors (52831692720).

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

21612962160 is a wasteful number, since it uses less digits than its factorization.

21612962160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006023 (or 10006011 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 21612962160 in words is "twenty-one billion, six hundred twelve million, nine hundred sixty-two thousand, one hundred sixty".