91020202002 has 24 divisors (see below), whose sum is σ = 197311595520. Its totient is φ = 30324504600.

The previous prime is 91020201997. The next prime is 91020202033. The reversal of 91020202002 is 20020202019.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260802 + ... + 1331037.

It is an arithmetic number, because the mean of its divisors is an integer number (8221316480).

Almost surely, 2^91020202002 is an apocalyptic number.

91020202002 is an abundant number, since it is smaller than the sum of its proper divisors (106291393518).

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

91020202002 is a wasteful number, since it uses less digits than its factorization.

91020202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593798 (or 2593795 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 91020202002 in words is "ninety-one billion, twenty million, two hundred two thousand, two".