21519168960 has 112 divisors (see below), whose sum is σ = 71919388800. Its totient is φ = 5436417024.

The previous prime is 21519168917. The next prime is 21519169027. The reversal of 21519168960 is 6986191512.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571650 + ... + 608129.

It is an arithmetic number, because the mean of its divisors is an integer number (642137400).

Almost surely, 2^21519168960 is an apocalyptic number.

21519168960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21519168960 is an abundant number, since it is smaller than the sum of its proper divisors (50400219840).

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

21519168960 is a wasteful number, since it uses less digits than its factorization.

21519168960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179818 (or 1179808 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 21519168960 in words is "twenty-one billion, five hundred nineteen million, one hundred sixty-eight thousand, nine hundred sixty".