18037836873681 has 4 divisors (see below), whose sum is σ = 24050449164912. Its totient is φ = 12025224582452.

The previous prime is 18037836873557. The next prime is 18037836873701. The reversal of 18037836873681 is 18637863873081.

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 18037836873681 - 2¹⁵ = 18037836840913 is a prime.

It is a super-2 number, since 2×18037836873681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18037836872681) 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, 3006306145611 + ... + 3006306145616.

It is an arithmetic number, because the mean of its divisors is an integer number (6012612291228).

Almost surely, 2^{18037836873681} is an apocalyptic number.

It is an amenable number.

18037836873681 is a deficient number, since it is larger than the sum of its proper divisors (6012612291231).

18037836873681 is an equidigital number, since it uses as much as digits as its factorization.

18037836873681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012612291230.

The product of its (nonzero) digits is 195084288, while the sum is 69.

The spelling of 18037836873681 in words is "eighteen trillion, thirty-seven billion, eight hundred thirty-six million, eight hundred seventy-three thousand, six hundred eighty-one".