18009249334 has 4 divisors (see below), whose sum is σ = 27013874004. Its totient is φ = 9004624666.

The previous prime is 18009249317. The next prime is 18009249359. The reversal of 18009249334 is 43394290081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43394290081 = 1069 ⋅40593349.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4502312332 + ... + 4502312335.

It is an arithmetic number, because the mean of its divisors is an integer number (6753468501).

Almost surely, 2^18009249334 is an apocalyptic number.

18009249334 is a deficient number, since it is larger than the sum of its proper divisors (9004624670).

18009249334 is an equidigital number, since it uses as much as digits as its factorization.

18009249334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9004624669.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 18009249334 in words is "eighteen billion, nine million, two hundred forty-nine thousand, three hundred thirty-four".