18866594562 has 16 divisors (see below), whose sum is σ = 37930747392. Its totient is φ = 6255938480.

The previous prime is 18866594497. The next prime is 18866594567. The reversal of 18866594562 is 26549566881.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18866594496 and 18866594505.

It is not an unprimeable number, because it can be changed into a prime (18866594567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8230353 + ... + 8232644.

It is an arithmetic number, because the mean of its divisors is an integer number (2370671712).

Almost surely, 2^18866594562 is an apocalyptic number.

18866594562 is an abundant number, since it is smaller than the sum of its proper divisors (19064152830).

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

18866594562 is a wasteful number, since it uses less digits than its factorization.

18866594562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16463193.

The product of its digits is 24883200, while the sum is 60.

The spelling of 18866594562 in words is "eighteen billion, eight hundred sixty-six million, five hundred ninety-four thousand, five hundred sixty-two".