18445190399 has 8 divisors (see below), whose sum is σ = 18658010448. Its totient is φ = 18233119360.

The previous prime is 18445190369. The next prime is 18445190437. The reversal of 18445190399 is 99309154481.

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 18445190399 - 2⁸ = 18445190143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18445190399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18445190339) 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, 137642 + ... + 236295.

It is an arithmetic number, because the mean of its divisors is an integer number (2332251306).

Almost surely, 2^18445190399 is an apocalyptic number.

18445190399 is a deficient number, since it is larger than the sum of its proper divisors (212820049).

18445190399 is a wasteful number, since it uses less digits than its factorization.

18445190399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374505.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 18445190399 in words is "eighteen billion, four hundred forty-five million, one hundred ninety thousand, three hundred ninety-nine".