90020111051 has 12 divisors (see below), whose sum is σ = 97569465840. Its totient is φ = 83017003680.

The previous prime is 90020111023. The next prime is 90020111053. The reversal of 90020111051 is 15011102009.

It is not a de Polignac number, because 90020111051 - 2¹⁴ = 90020094667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90020111053) 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, 71711 + ... + 430328.

It is an arithmetic number, because the mean of its divisors is an integer number (8130788820).

Almost surely, 2^90020111051 is an apocalyptic number.

90020111051 is a deficient number, since it is larger than the sum of its proper divisors (7549354789).

90020111051 is a wasteful number, since it uses less digits than its factorization.

90020111051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503126 (or 503113 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 20.

The spelling of 90020111051 in words is "ninety billion, twenty million, one hundred eleven thousand, fifty-one".