21927180160 has 64 divisors (see below), whose sum is σ = 52733812320. Its totient is φ = 8718309376.

The previous prime is 21927180131. The next prime is 21927180181. The reversal of 21927180160 is 6108172912.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4302 + ... + 209458.

Almost surely, 2^21927180160 is an apocalyptic number.

21927180160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21927180160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26366906160).

21927180160 is an abundant number, since it is smaller than the sum of its proper divisors (30806632160).

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

21927180160 is a wasteful number, since it uses less digits than its factorization.

21927180160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205343 (or 205331 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 21927180160 in words is "twenty-one billion, nine hundred twenty-seven million, one hundred eighty thousand, one hundred sixty".