18168136968 has 16 divisors (see below), whose sum is σ = 45420342480. Its totient is φ = 6056045648.

The previous prime is 18168136967. The next prime is 18168136991. The reversal of 18168136968 is 86963186181.

It is not an unprimeable number, because it can be changed into a prime (18168136967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378502830 + ... + 378502877.

It is an arithmetic number, because the mean of its divisors is an integer number (2838771405).

Almost surely, 2^18168136968 is an apocalyptic number.

It is an amenable number.

18168136968 is an abundant number, since it is smaller than the sum of its proper divisors (27252205512).

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

18168136968 is a wasteful number, since it uses less digits than its factorization.

18168136968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757005716 (or 757005712 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 57.

The spelling of 18168136968 in words is "eighteen billion, one hundred sixty-eight million, one hundred thirty-six thousand, nine hundred sixty-eight".