18580607818 has 16 divisors (see below), whose sum is σ = 28426917600. Its totient is φ = 9105340816.

The previous prime is 18580607809. The next prime is 18580607819. The reversal of 18580607818 is 81870608581.

It is a happy number.

It is a super-2 number, since 2×18580607818² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18580607819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7833 + ... + 192931.

It is an arithmetic number, because the mean of its divisors is an integer number (1776682350).

Almost surely, 2^18580607818 is an apocalyptic number.

18580607818 is a deficient number, since it is larger than the sum of its proper divisors (9846309782).

18580607818 is a wasteful number, since it uses less digits than its factorization.

18580607818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186101.

The product of its (nonzero) digits is 860160, while the sum is 52.

The spelling of 18580607818 in words is "eighteen billion, five hundred eighty million, six hundred seven thousand, eight hundred eighteen".