18448800399 has 48 divisors (see below), whose sum is σ = 28433296320. Its totient is φ = 11504747520.

The previous prime is 18448800397. The next prime is 18448800413. The reversal of 18448800399 is 99300884481.

It is not a de Polignac number, because 18448800399 - 2¹ = 18448800397 is a prime.

It is a super-3 number, since 3×18448800399³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448800397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2323374 + ... + 2331300.

It is an arithmetic number, because the mean of its divisors is an integer number (592360340).

Almost surely, 2^18448800399 is an apocalyptic number.

18448800399 is a deficient number, since it is larger than the sum of its proper divisors (9984495921).

18448800399 is a wasteful number, since it uses less digits than its factorization.

18448800399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8240 (or 8237 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 18448800399 in words is "eighteen billion, four hundred forty-eight million, eight hundred thousand, three hundred ninety-nine".