18934363999 has 8 divisors (see below), whose sum is σ = 18994828320. Its totient is φ = 18873943296.

The previous prime is 18934363969. The next prime is 18934364039. The reversal of 18934363999 is 99936343981.

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 18934363999 - 2⁵ = 18934363967 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 18934363999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18934363909) 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, 1007739 + ... + 1026355.

It is an arithmetic number, because the mean of its divisors is an integer number (2374353540).

Almost surely, 2^18934363999 is an apocalyptic number.

18934363999 is a deficient number, since it is larger than the sum of its proper divisors (60464321).

18934363999 is a wasteful number, since it uses less digits than its factorization.

18934363999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21809.

The product of its digits is 34012224, while the sum is 64.

The spelling of 18934363999 in words is "eighteen billion, nine hundred thirty-four million, three hundred sixty-three thousand, nine hundred ninety-nine".