18333204959 has 4 divisors (see below), whose sum is σ = 18439177416. Its totient is φ = 18227232504.

The previous prime is 18333204947. The next prime is 18333204983. The reversal of 18333204959 is 95940233381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18333204959 - 2¹² = 18333200863 is a prime.

It is a super-2 number, since 2×18333204959² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18333204059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52985969 + ... + 52986314.

It is an arithmetic number, because the mean of its divisors is an integer number (4609794354).

Almost surely, 2^18333204959 is an apocalyptic number.

18333204959 is a deficient number, since it is larger than the sum of its proper divisors (105972457).

18333204959 is a wasteful number, since it uses less digits than its factorization.

18333204959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105972456.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 18333204959 in words is "eighteen billion, three hundred thirty-three million, two hundred four thousand, nine hundred fifty-nine".