18390430800 has 180 divisors, whose sum is σ = 72937132320. Its totient is φ = 4203521280.

The previous prime is 18390430789. The next prime is 18390430829. The reversal of 18390430800 is 803409381.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 339690 + ... + 390089.

Almost surely, 2^18390430800 is an apocalyptic number.

18390430800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18390430800 is an abundant number, since it is smaller than the sum of its proper divisors (54546701520).

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

18390430800 is a wasteful number, since it uses less digits than its factorization.

18390430800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729810 (or 729796 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 18390430800 in words is "eighteen billion, three hundred ninety million, four hundred thirty thousand, eight hundred".