18355208922 has 12 divisors (see below), whose sum is σ = 39769619370. Its totient is φ = 6118402968.

The previous prime is 18355208917. The next prime is 18355208929. The reversal of 18355208922 is 22980255381.

18355208922 is a `hidden beast` number, since 1 + 8 + 3 + 552 + 0 + 8 + 92 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17158118121 + 1197090801 = 130989^2 + 34599^2 .

It is not an unprimeable number, because it can be changed into a prime (18355208929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509866897 + ... + 509866932.

Almost surely, 2^18355208922 is an apocalyptic number.

18355208922 is an abundant number, since it is smaller than the sum of its proper divisors (21414410448).

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

18355208922 is a wasteful number, since it uses less digits than its factorization.

18355208922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019733837 (or 1019733834 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 18355208922 in words is "eighteen billion, three hundred fifty-five million, two hundred eight thousand, nine hundred twenty-two".