18686230037 has 4 divisors (see below), whose sum is σ = 18691823040. Its totient is φ = 18680637036.

The previous prime is 18686230033. The next prime is 18686230039. The reversal of 18686230037 is 73003268681.

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 18686230037 - 2² = 18686230033 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 18686230037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18686230033) 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, 2791487 + ... + 2798172.

It is an arithmetic number, because the mean of its divisors is an integer number (4672955760).

Almost surely, 2^18686230037 is an apocalyptic number.

It is an amenable number.

18686230037 is a deficient number, since it is larger than the sum of its proper divisors (5593003).

18686230037 is an equidigital number, since it uses as much as digits as its factorization.

18686230037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593002.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 18686230037 in words is "eighteen billion, six hundred eighty-six million, two hundred thirty thousand, thirty-seven".