18594019664 has 60 divisors (see below), whose sum is σ = 40669123572. Its totient is φ = 8223367680.

The previous prime is 18594019663. The next prime is 18594019669. The reversal of 18594019664 is 46691049581.

It can be written as a sum of positive squares in 2 ways, for example, as 15286849600 + 3307170064 = 123640^2 + 57508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18594019663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58157 + ... + 201420.

Almost surely, 2^18594019664 is an apocalyptic number.

It is an amenable number.

18594019664 is an abundant number, since it is smaller than the sum of its proper divisors (22075103908).

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

18594019664 is a wasteful number, since it uses less digits than its factorization.

18594019664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259644 (or 259627 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 18594019664 in words is "eighteen billion, five hundred ninety-four million, nineteen thousand, six hundred sixty-four".