18393914339 has 4 divisors (see below), whose sum is σ = 18556692456. Its totient is φ = 18231136224.

The previous prime is 18393914293. The next prime is 18393914353. The reversal of 18393914339 is 93341939381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93341939381 = 149 ⋅626455969.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18393914339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18393914359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81388889 + ... + 81389114.

It is an arithmetic number, because the mean of its divisors is an integer number (4639173114).

Almost surely, 2^18393914339 is an apocalyptic number.

18393914339 is a deficient number, since it is larger than the sum of its proper divisors (162778117).

18393914339 is a wasteful number, since it uses less digits than its factorization.

18393914339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162778116.

The product of its digits is 1889568, while the sum is 53.

The spelling of 18393914339 in words is "eighteen billion, three hundred ninety-three million, nine hundred fourteen thousand, three hundred thirty-nine".