91820100920 has 16 divisors (see below), whose sum is σ = 206595227160. Its totient is φ = 36728040352.

The previous prime is 91820100907. The next prime is 91820100959. The reversal of 91820100920 is 2900102819.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147751222 + ... + 1147751301.

Almost surely, 2^91820100920 is an apocalyptic number.

It is an amenable number.

91820100920 is an abundant number, since it is smaller than the sum of its proper divisors (114775126240).

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

91820100920 is a wasteful number, since it uses less digits than its factorization.

91820100920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295502534 (or 2295502530 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 91820100920 in words is "ninety-one billion, eight hundred twenty million, one hundred thousand, nine hundred twenty".