18094308409 has 4 divisors (see below), whose sum is σ = 18189043200. Its totient is φ = 17999573620.

The previous prime is 18094308359. The next prime is 18094308413. The reversal of 18094308409 is 90480349081.

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 18094308409 - 2³³ = 9504373817 is a prime.

It is a super-2 number, since 2×18094308409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18095308409) 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, 47367109 + ... + 47367490.

It is an arithmetic number, because the mean of its divisors is an integer number (4547260800).

Almost surely, 2^18094308409 is an apocalyptic number.

It is an amenable number.

18094308409 is a deficient number, since it is larger than the sum of its proper divisors (94734791).

18094308409 is an equidigital number, since it uses as much as digits as its factorization.

18094308409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94734790.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 18094308409 in words is "eighteen billion, ninety-four million, three hundred eight thousand, four hundred nine".