18136505274 has 8 divisors (see below), whose sum is σ = 36273010560. Its totient is φ = 6045501756.

The previous prime is 18136505263. The next prime is 18136505281. The reversal of 18136505274 is 47250563181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

18136505274 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511375434 + ... + 1511375445.

It is an arithmetic number, because the mean of its divisors is an integer number (4534126320).

Almost surely, 2^18136505274 is an apocalyptic number.

18136505274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18136505274 is a wasteful number, since it uses less digits than its factorization.

18136505274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022750884.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 18136505274 in words is "eighteen billion, one hundred thirty-six million, five hundred five thousand, two hundred seventy-four".