18375004237 has 4 divisors (see below), whose sum is σ = 18375277500. Its totient is φ = 18374730976.

The previous prime is 18375004223. The next prime is 18375004337. The reversal of 18375004237 is 73240057381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 73240057381 = 181 ⋅404641201.

It can be written as a sum of positive squares in 2 ways, for example, as 5747762596 + 12627241641 = 75814^2 + 112371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18375004237 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 18375004237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18375004337) 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, 42639 + ... + 196387.

It is an arithmetic number, because the mean of its divisors is an integer number (4593819375).

Almost surely, 2^18375004237 is an apocalyptic number.

It is an amenable number.

18375004237 is a deficient number, since it is larger than the sum of its proper divisors (273263).

18375004237 is a wasteful number, since it uses less digits than its factorization.

18375004237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273262.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 18375004237 in words is "eighteen billion, three hundred seventy-five million, four thousand, two hundred thirty-seven".