90909200920 has 16 divisors (see below), whose sum is σ = 204545702160. Its totient is φ = 36363680352.

The previous prime is 90909200881. The next prime is 90909200923. The reversal of 90909200920 is 2900290909.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 2272730023 = 90909200920 / (9 + 0 + 9 + 0 + 9 + 2 + 0 + 0 + 9 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909200923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136364972 + ... + 1136365051.

It is an arithmetic number, because the mean of its divisors is an integer number (12784106385).

Almost surely, 2^90909200920 is an apocalyptic number.

It is an amenable number.

90909200920 is an abundant number, since it is smaller than the sum of its proper divisors (113636501240).

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

90909200920 is a wasteful number, since it uses less digits than its factorization.

90909200920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272730034 (or 2272730030 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

The spelling of 90909200920 in words is "ninety billion, nine hundred nine million, two hundred thousand, nine hundred twenty".