18077297418 has 32 divisors (see below), whose sum is σ = 40830333120. Its totient is φ = 5926981680.

The previous prime is 18077297411. The next prime is 18077297431. The reversal of 18077297418 is 81479277081.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18077297411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2740680 + ... + 2747267.

It is an arithmetic number, because the mean of its divisors is an integer number (1275947910).

Almost surely, 2^18077297418 is an apocalyptic number.

18077297418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18077297418 is an abundant number, since it is smaller than the sum of its proper divisors (22753035702).

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

18077297418 is a wasteful number, since it uses less digits than its factorization.

18077297418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5488019 (or 5488013 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 54.

The spelling of 18077297418 in words is "eighteen billion, seventy-seven million, two hundred ninety-seven thousand, four hundred eighteen".