18364779893 has 8 divisors (see below), whose sum is σ = 19524820608. Its totient is φ = 17234870224.

The previous prime is 18364779877. The next prime is 18364779913. The reversal of 18364779893 is 39897746381.

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 18364779893 - 2⁴ = 18364779877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364775893) 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, 7531505 + ... + 7533942.

It is an arithmetic number, because the mean of its divisors is an integer number (2440602576).

Almost surely, 2^18364779893 is an apocalyptic number.

It is an amenable number.

18364779893 is a deficient number, since it is larger than the sum of its proper divisors (1160040715).

18364779893 is a wasteful number, since it uses less digits than its factorization.

18364779893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15065523.

The product of its digits is 54867456, while the sum is 65.

The spelling of 18364779893 in words is "eighteen billion, three hundred sixty-four million, seven hundred seventy-nine thousand, eight hundred ninety-three".