18336853537 has 4 divisors (see below), whose sum is σ = 18376119216. Its totient is φ = 18297587860.

The previous prime is 18336853487. The next prime is 18336853567. The reversal of 18336853537 is 73535863381.

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 a de Polignac number, because none of the positive numbers 2^k-18336853537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336853567) 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, 19632139 + ... + 19633072.

It is an arithmetic number, because the mean of its divisors is an integer number (4594029804).

Almost surely, 2^18336853537 is an apocalyptic number.

It is an amenable number.

18336853537 is a deficient number, since it is larger than the sum of its proper divisors (39265679).

18336853537 is an equidigital number, since it uses as much as digits as its factorization.

18336853537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39265678.

The product of its digits is 5443200, while the sum is 52.

The spelling of 18336853537 in words is "eighteen billion, three hundred thirty-six million, eight hundred fifty-three thousand, five hundred thirty-seven".