18238563426 has 8 divisors (see below), whose sum is σ = 36477126864. Its totient is φ = 6079521140.

The previous prime is 18238563383. The next prime is 18238563433. The reversal of 18238563426 is 62436583281.

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

18238563426 is an admirable number.

It is a Curzon number.

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, 1519880280 + ... + 1519880291.

It is an arithmetic number, because the mean of its divisors is an integer number (4559640858).

Almost surely, 2^18238563426 is an apocalyptic number.

18238563426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18238563426 is a wasteful number, since it uses less digits than its factorization.

18238563426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039760576.

The product of its digits is 1658880, while the sum is 48.

The spelling of 18238563426 in words is "eighteen billion, two hundred thirty-eight million, five hundred sixty-three thousand, four hundred twenty-six".