18601151994 has 48 divisors (see below), whose sum is σ = 41671506240. Its totient is φ = 5992595520.

The previous prime is 18601151993. The next prime is 18601151999. The reversal of 18601151994 is 49915110681.

18601151994 is a `hidden beast` number, since 18 + 601 + 15 + 19 + 9 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (18601151993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38814 + ... + 196745.

It is an arithmetic number, because the mean of its divisors is an integer number (868156380).

Almost surely, 2^18601151994 is an apocalyptic number.

18601151994 is an abundant number, since it is smaller than the sum of its proper divisors (23070354246).

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

18601151994 is a wasteful number, since it uses less digits than its factorization.

18601151994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235715 (or 235712 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 45.

The spelling of 18601151994 in words is "eighteen billion, six hundred one million, one hundred fifty-one thousand, nine hundred ninety-four".