18244513199 has 4 divisors (see below), whose sum is σ = 19903105320. Its totient is φ = 16585921080.

The previous prime is 18244513181. The next prime is 18244513201. The reversal of 18244513199 is 99131544281.

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 18244513199 - 2²⁴ = 18227735983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18244513799) 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, 829296044 + ... + 829296065.

It is an arithmetic number, because the mean of its divisors is an integer number (4975776330).

Almost surely, 2^18244513199 is an apocalyptic number.

18244513199 is a deficient number, since it is larger than the sum of its proper divisors (1658592121).

18244513199 is a wasteful number, since it uses less digits than its factorization.

18244513199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658592120.

The product of its digits is 311040, while the sum is 47.

The spelling of 18244513199 in words is "eighteen billion, two hundred forty-four million, five hundred thirteen thousand, one hundred ninety-nine".