18338385037 has 4 divisors (see below), whose sum is σ = 20958154336. Its totient is φ = 15718615740.

The previous prime is 18338385011. The next prime is 18338385041. The reversal of 18338385037 is 73058383381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18338385037 - 2²³ = 18329996429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338385337) 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, 1309884639 + ... + 1309884652.

It is an arithmetic number, because the mean of its divisors is an integer number (5239538584).

Almost surely, 2^18338385037 is an apocalyptic number.

It is an amenable number.

18338385037 is a deficient number, since it is larger than the sum of its proper divisors (2619769299).

18338385037 is an equidigital number, since it uses as much as digits as its factorization.

18338385037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619769298.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 18338385037 in words is "eighteen billion, three hundred thirty-eight million, three hundred eighty-five thousand, thirty-seven".