18696118572 has 96 divisors (see below), whose sum is σ = 50212612800. Its totient is φ = 6011596800.

The previous prime is 18696118561. The next prime is 18696118621. The reversal of 18696118572 is 27581169681.

It is a happy number.

18696118572 is a `hidden beast` number, since 1 + 8 + 6 + 9 + 61 + 1 + 8 + 572 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370372 + ... + 417812.

It is an arithmetic number, because the mean of its divisors is an integer number (523048050).

Almost surely, 2^18696118572 is an apocalyptic number.

18696118572 is a gapful number since it is divisible by the number (12) 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 18696118572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25106306400).

18696118572 is an abundant number, since it is smaller than the sum of its proper divisors (31516494228).

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

18696118572 is a wasteful number, since it uses less digits than its factorization.

18696118572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47584 (or 47576 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 18696118572 in words is "eighteen billion, six hundred ninety-six million, one hundred eighteen thousand, five hundred seventy-two".