91820020182 has 24 divisors (see below), whose sum is σ = 201852277368. Its totient is φ = 27824248320.

The previous prime is 91820020157. The next prime is 91820020189. The reversal of 91820020182 is 28102002819.

It is a super-2 number, since 2×91820020182² (a number of 23 digits) contains 22 as substring.

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 (91820020189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63236203 + ... + 63237654.

It is an arithmetic number, because the mean of its divisors is an integer number (8410511557).

Almost surely, 2^91820020182 is an apocalyptic number.

91820020182 is an abundant number, since it is smaller than the sum of its proper divisors (110032257186).

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

91820020182 is a wasteful number, since it uses less digits than its factorization.

91820020182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126473884 (or 126473873 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 91820020182 in words is "ninety-one billion, eight hundred twenty million, twenty thousand, one hundred eighty-two".