18399818003 has 8 divisors (see below), whose sum is σ = 21134035200. Its totient is φ = 15692018760.

The previous prime is 18399817979. The next prime is 18399818069. The reversal of 18399818003 is 30081899381.

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

It is a cyclic number.

It is not a de Polignac number, because 18399818003 - 2⁸ = 18399817747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18399818603) 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, 6602993 + ... + 6605778.

It is an arithmetic number, because the mean of its divisors is an integer number (2641754400).

Almost surely, 2^18399818003 is an apocalyptic number.

18399818003 is a deficient number, since it is larger than the sum of its proper divisors (2734217197).

18399818003 is a wasteful number, since it uses less digits than its factorization.

18399818003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208977.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 18399818003 in words is "eighteen billion, three hundred ninety-nine million, eight hundred eighteen thousand, three".