90211320918 has 32 divisors (see below), whose sum is σ = 200821989600. Its totient is φ = 30017582208.

The previous prime is 90211320917. The next prime is 90211321001. The reversal of 90211320918 is 81902311209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90211320917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1437271 + ... + 1498722.

It is an arithmetic number, because the mean of its divisors is an integer number (6275687175).

Almost surely, 2^90211320918 is an apocalyptic number.

90211320918 is an abundant number, since it is smaller than the sum of its proper divisors (110610668682).

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

90211320918 is a wasteful number, since it uses less digits than its factorization.

90211320918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936573 (or 2936567 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 90211320918 in words is "ninety billion, two hundred eleven million, three hundred twenty thousand, nine hundred eighteen".