18578934864 has 180 divisors, whose sum is σ = 60775752960. Its totient is φ = 5282686080.

The previous prime is 18578934841. The next prime is 18578934893. The reversal of 18578934864 is 46843987581.

18578934864 is a `hidden beast` number, since 1 + 85 + 78 + 9 + 3 + 486 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1482577 + ... + 1495055.

It is an arithmetic number, because the mean of its divisors is an integer number (337643072).

Almost surely, 2^18578934864 is an apocalyptic number.

18578934864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18578934864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30387876480).

18578934864 is an abundant number, since it is smaller than the sum of its proper divisors (42196818096).

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

18578934864 is a wasteful number, since it uses less digits than its factorization.

18578934864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12718 (or 12702 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 18578934864 in words is "eighteen billion, five hundred seventy-eight million, nine hundred thirty-four thousand, eight hundred sixty-four".