18400958018 has 8 divisors (see below), whose sum is σ = 27691344912. Its totient is φ = 9170509716.

The previous prime is 18400957969. The next prime is 18400958047. The reversal of 18400958018 is 81085900481.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18400958018.

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, 14983880 + ... + 14985107.

It is an arithmetic number, because the mean of its divisors is an integer number (3461418114).

Almost surely, 2^18400958018 is an apocalyptic number.

18400958018 is a deficient number, since it is larger than the sum of its proper divisors (9290386894).

18400958018 is a wasteful number, since it uses less digits than its factorization.

18400958018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29969296.

The product of its (nonzero) digits is 92160, while the sum is 44.

The spelling of 18400958018 in words is "eighteen billion, four hundred million, nine hundred fifty-eight thousand, eighteen".