18844309394 has 8 divisors (see below), whose sum is σ = 28271667900. Its totient is φ = 9420420096.

The previous prime is 18844309381. The next prime is 18844309397. The reversal of 18844309394 is 49390344881.

It can be written as a sum of positive squares in 2 ways, for example, as 18622150369 + 222159025 = 136463^2 + 14905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18844309397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853679 + ... + 875474.

Almost surely, 2^18844309394 is an apocalyptic number.

18844309394 is a deficient number, since it is larger than the sum of its proper divisors (9427358506).

18844309394 is a wasteful number, since it uses less digits than its factorization.

18844309394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734604.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 18844309394 in words is "eighteen billion, eight hundred forty-four million, three hundred nine thousand, three hundred ninety-four".