18372356839 has 4 divisors (see below), whose sum is σ = 18378486000. Its totient is φ = 18366227680.

The previous prime is 18372356837. The next prime is 18372356843. The reversal of 18372356839 is 93865327381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93865327381 = 7 ⋅13409332483.

It is a cyclic number.

It is not a de Polignac number, because 18372356839 - 2¹ = 18372356837 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 18372356839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18372356837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3060082 + ... + 3066079.

It is an arithmetic number, because the mean of its divisors is an integer number (4594621500).

Almost surely, 2^18372356839 is an apocalyptic number.

18372356839 is a deficient number, since it is larger than the sum of its proper divisors (6129161).

18372356839 is an equidigital number, since it uses as much as digits as its factorization.

18372356839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129160.

The product of its digits is 6531840, while the sum is 55.

The spelling of 18372356839 in words is "eighteen billion, three hundred seventy-two million, three hundred fifty-six thousand, eight hundred thirty-nine".