18399080448 has 208 divisors, whose sum is σ = 62298780160. Its totient is φ = 5256658944.

The previous prime is 18399080431. The next prime is 18399080471. The reversal of 18399080448 is 84408099381.

18399080448 is a `hidden beast` number, since 1 + 8 + 39 + 90 + 80 + 448 = 666.

It is a super-2 number, since 2×18399080448² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 18399080394 and 18399080403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 762261 + ... + 786027.

Almost surely, 2^18399080448 is an apocalyptic number.

18399080448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18399080448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31149390080).

18399080448 is an abundant number, since it is smaller than the sum of its proper divisors (43899699712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18399080448 is an equidigital number, since it uses as much as digits as its factorization.

18399080448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23807 (or 23779 counting only the distinct ones).

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

The spelling of 18399080448 in words is "eighteen billion, three hundred ninety-nine million, eighty thousand, four hundred forty-eight".