18399958226 has 16 divisors (see below), whose sum is σ = 31287379200. Its totient is φ = 8045325648.

The previous prime is 18399958223. The next prime is 18399958249. The reversal of 18399958226 is 62285999381.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18399958223) 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, 18622946 + ... + 18623933.

It is an arithmetic number, because the mean of its divisors is an integer number (1955461200).

Almost surely, 2^18399958226 is an apocalyptic number.

18399958226 is a deficient number, since it is larger than the sum of its proper divisors (12887420974).

18399958226 is a wasteful number, since it uses less digits than its factorization.

18399958226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37246913.

The product of its digits is 16796160, while the sum is 62.

The spelling of 18399958226 in words is "eighteen billion, three hundred ninety-nine million, nine hundred fifty-eight thousand, two hundred twenty-six".