21522953088 has 576 divisors, whose sum is σ = 81241898400. Its totient is φ = 5336727552.

The previous prime is 21522953069. The next prime is 21522953119. The reversal of 21522953088 is 88035922512.

21522953088 is a `hidden beast` number, since 2 + 1 + 52 + 295 + 308 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23167408 + ... + 23168336.

Almost surely, 2^21522953088 is an apocalyptic number.

21522953088 is a gapful number since it is divisible by the number (28) 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 21522953088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40620949200).

21522953088 is an abundant number, since it is smaller than the sum of its proper divisors (59718945312).

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

21522953088 is a wasteful number, since it uses less digits than its factorization.

21522953088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 21522953088 in words is "twenty-one billion, five hundred twenty-two million, nine hundred fifty-three thousand, eighty-eight".