18864836458 has 32 divisors (see below), whose sum is σ = 31725786960. Its totient is φ = 8353013760.

The previous prime is 18864836411. The next prime is 18864836467. The reversal of 18864836458 is 85463846881.

It can be written as a sum of positive squares in 8 ways, for example, as 1095146649 + 17769689809 = 33093^2 + 133303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18864836396 and 18864836405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38698 + ... + 198058.

Almost surely, 2^18864836458 is an apocalyptic number.

18864836458 is a deficient number, since it is larger than the sum of its proper divisors (12860950502).

18864836458 is a wasteful number, since it uses less digits than its factorization.

18864836458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159562.

The product of its digits is 35389440, while the sum is 61.

The spelling of 18864836458 in words is "eighteen billion, eight hundred sixty-four million, eight hundred thirty-six thousand, four hundred fifty-eight".