90672991020 has 72 divisors (see below), whose sum is σ = 278522986560. Its totient is φ = 23873391360.

The previous prime is 90672990997. The next prime is 90672991037. The reversal of 90672991020 is 2019927609.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3174001 + ... + 3202440.

Almost surely, 2^90672991020 is an apocalyptic number.

90672991020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90672991020 is an abundant number, since it is smaller than the sum of its proper divisors (187849995540).

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

90672991020 is a wasteful number, since it uses less digits than its factorization.

90672991020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376535 (or 6376530 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 90672991020 in words is "ninety billion, six hundred seventy-two million, nine hundred ninety-one thousand, twenty".