90921931242 has 16 divisors (see below), whose sum is σ = 181969030560. Its totient is φ = 30286449072.

The previous prime is 90921931223. The next prime is 90921931279. The reversal of 90921931242 is 24213912909.

It is a junction number, because it is equal to n+sod(n) for n = 90921931194 and 90921931203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5205892 + ... + 5223327.

It is an arithmetic number, because the mean of its divisors is an integer number (11373064410).

Almost surely, 2^90921931242 is an apocalyptic number.

90921931242 is an abundant number, since it is smaller than the sum of its proper divisors (91047099318).

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

90921931242 is a wasteful number, since it uses less digits than its factorization.

90921931242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10430677.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 90921931242 in words is "ninety billion, nine hundred twenty-one million, nine hundred thirty-one thousand, two hundred forty-two".