18007904361 has 4 divisors (see below), whose sum is σ = 24010539152. Its totient is φ = 12005269572.

The previous prime is 18007904357. The next prime is 18007904363. The reversal of 18007904361 is 16340970081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16340970081 = 3 ⋅5446990027.

It is not a de Polignac number, because 18007904361 - 2² = 18007904357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18007904363) 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, 3001317391 + ... + 3001317396.

It is an arithmetic number, because the mean of its divisors is an integer number (6002634788).

Almost surely, 2^18007904361 is an apocalyptic number.

It is an amenable number.

18007904361 is a deficient number, since it is larger than the sum of its proper divisors (6002634791).

18007904361 is an equidigital number, since it uses as much as digits as its factorization.

18007904361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002634790.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 18007904361 in words is "eighteen billion, seven million, nine hundred four thousand, three hundred sixty-one".