18856359522 has 480 divisors, whose sum is σ = 59103741312. Its totient is φ = 4375166400.

The previous prime is 18856359521. The next prime is 18856359539. The reversal of 18856359522 is 22595365881.

It is a happy number.

18856359522 is a `hidden beast` number, since 1 + 8 + 8 + 5 + 63 + 59 + 522 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18856359521) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 608269647 + ... + 608269677.

Almost surely, 2^18856359522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18856359522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29551870656).

18856359522 is an abundant number, since it is smaller than the sum of its proper divisors (40247381790).

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

18856359522 is a wasteful number, since it uses less digits than its factorization.

18856359522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 67 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 18856359522 in words is "eighteen billion, eight hundred fifty-six million, three hundred fifty-nine thousand, five hundred twenty-two".