91910020092 has 24 divisors (see below), whose sum is σ = 233952778752. Its totient is φ = 27851521200.

The previous prime is 91910020049. The next prime is 91910020093. The reversal of 91910020092 is 29002001919.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91910020093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348143884 + ... + 348144147.

It is an arithmetic number, because the mean of its divisors is an integer number (9748032448).

Almost surely, 2^91910020092 is an apocalyptic number.

It is an amenable number.

91910020092 is an abundant number, since it is smaller than the sum of its proper divisors (142042758660).

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

91910020092 is a wasteful number, since it uses less digits than its factorization.

91910020092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696288049 (or 696288047 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 91910020092 in words is "ninety-one billion, nine hundred ten million, twenty thousand, ninety-two".