18238472133 has 12 divisors (see below), whose sum is σ = 28288242720. Its totient is φ = 10421983992.

The previous prime is 18238472129. The next prime is 18238472143. The reversal of 18238472133 is 33127483281.

It is a happy number.

It is not a de Polignac number, because 18238472133 - 2² = 18238472129 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18238472143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62035473 + ... + 62035766.

It is an arithmetic number, because the mean of its divisors is an integer number (2357353560).

Almost surely, 2^18238472133 is an apocalyptic number.

It is an amenable number.

18238472133 is a deficient number, since it is larger than the sum of its proper divisors (10049770587).

18238472133 is a wasteful number, since it uses less digits than its factorization.

18238472133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124071256 (or 124071249 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The spelling of 18238472133 in words is "eighteen billion, two hundred thirty-eight million, four hundred seventy-two thousand, one hundred thirty-three".