21292816760 has 32 divisors (see below), whose sum is σ = 47916802800. Its totient is φ = 8515710720.

The previous prime is 21292816759. The next prime is 21292816771. The reversal of 21292816760 is 6761829212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218636 + ... + 300644.

Almost surely, 2^21292816760 is an apocalyptic number.

21292816760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21292816760 is an abundant number, since it is smaller than the sum of its proper divisors (26623986040).

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

21292816760 is a wasteful number, since it uses less digits than its factorization.

21292816760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88511 (or 88507 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 21292816760 in words is "twenty-one billion, two hundred ninety-two million, eight hundred sixteen thousand, seven hundred sixty".