18154618437 has 4 divisors (see below), whose sum is σ = 24206157920. Its totient is φ = 12103078956.

The previous prime is 18154618429. The next prime is 18154618459. The reversal of 18154618437 is 73481645181.

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 not a de Polignac number, because 18154618437 - 2³ = 18154618429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18154618337) 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, 3025769737 + ... + 3025769742.

It is an arithmetic number, because the mean of its divisors is an integer number (6051539480).

Almost surely, 2^18154618437 is an apocalyptic number.

It is an amenable number.

18154618437 is a deficient number, since it is larger than the sum of its proper divisors (6051539483).

18154618437 is an equidigital number, since it uses as much as digits as its factorization.

18154618437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051539482.

The product of its digits is 645120, while the sum is 48.

The spelling of 18154618437 in words is "eighteen billion, one hundred fifty-four million, six hundred eighteen thousand, four hundred thirty-seven".