18396134658 has 192 divisors, whose sum is σ = 45459947520. Its totient is φ = 5328892800.

The previous prime is 18396134641. The next prime is 18396134663. The reversal of 18396134658 is 85643169381.

18396134658 is a `hidden beast` number, since 1 + 83 + 96 + 13 + 465 + 8 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 102771613 + ... + 102771791.

It is an arithmetic number, because the mean of its divisors is an integer number (236770560).

Almost surely, 2^18396134658 is an apocalyptic number.

18396134658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18396134658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22729973760).

18396134658 is an abundant number, since it is smaller than the sum of its proper divisors (27063812862).

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

18396134658 is a wasteful number, since it uses less digits than its factorization.

18396134658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 450 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 18396134658 in words is "eighteen billion, three hundred ninety-six million, one hundred thirty-four thousand, six hundred fifty-eight".