18147117740 has 24 divisors (see below), whose sum is σ = 40114682160. Its totient is φ = 6876802368.

The previous prime is 18147117673. The next prime is 18147117767. The reversal of 18147117740 is 4771174181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23877407 + ... + 23878166.

It is an arithmetic number, because the mean of its divisors is an integer number (1671445090).

Almost surely, 2^18147117740 is an apocalyptic number.

18147117740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18147117740 is an abundant number, since it is smaller than the sum of its proper divisors (21967564420).

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

18147117740 is a wasteful number, since it uses less digits than its factorization.

18147117740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47755601 (or 47755599 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 41.

The spelling of 18147117740 in words is "eighteen billion, one hundred forty-seven million, one hundred seventeen thousand, seven hundred forty".