21190528560 has 320 divisors, whose sum is σ = 71869400064. Its totient is φ = 5143756800.

The previous prime is 21190528553. The next prime is 21190528621. The reversal of 21190528560 is 6582509112.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21913197 + ... + 21914163.

Almost surely, 2^21190528560 is an apocalyptic number.

21190528560 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 21190528560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35934700032).

21190528560 is an abundant number, since it is smaller than the sum of its proper divisors (50678871504).

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

21190528560 is a wasteful number, since it uses less digits than its factorization.

21190528560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 21190528560 in words is "twenty-one billion, one hundred ninety million, five hundred twenty-eight thousand, five hundred sixty".