18034004437 has 4 divisors (see below), whose sum is σ = 18329643916. Its totient is φ = 17738364960.

The previous prime is 18034004431. The next prime is 18034004477. The reversal of 18034004437 is 73440043081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73440043081 = 103 ⋅713010127.

It can be written as a sum of positive squares in 2 ways, for example, as 641406276 + 17392598161 = 25326^2 + 131881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18034004437 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 (18034004431) 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, 147819648 + ... + 147819769.

It is an arithmetic number, because the mean of its divisors is an integer number (4582410979).

Almost surely, 2^18034004437 is an apocalyptic number.

It is an amenable number.

18034004437 is a deficient number, since it is larger than the sum of its proper divisors (295639479).

18034004437 is an equidigital number, since it uses as much as digits as its factorization.

18034004437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295639478.

The product of its (nonzero) digits is 32256, while the sum is 34.

The spelling of 18034004437 in words is "eighteen billion, thirty-four million, four thousand, four hundred thirty-seven".