90021318320 has 40 divisors (see below), whose sum is σ = 213248623536. Its totient is φ = 35329119488.

The previous prime is 90021318313. The next prime is 90021318367. The reversal of 90021318320 is 2381312009.

It is a tau number, because it is divible by the number of its divisors (40).

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, 10611482 + ... + 10619961.

Almost surely, 2^90021318320 is an apocalyptic number.

It is an amenable number.

90021318320 is an abundant number, since it is smaller than the sum of its proper divisors (123227305216).

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

90021318320 is a wasteful number, since it uses less digits than its factorization.

90021318320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21231509 (or 21231503 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 90021318320 in words is "ninety billion, twenty-one million, three hundred eighteen thousand, three hundred twenty".