18308907 has 12 divisors (see below), whose sum is σ = 26562744. Its totient is φ = 12152160.

The previous prime is 18308893. The next prime is 18308909. The reversal of 18308907 is 70980381.

It is not a de Polignac number, because 18308907 - 2⁸ = 18308651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18308909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2269 + ... + 6462.

It is an arithmetic number, because the mean of its divisors is an integer number (2213562).

Almost surely, 2^18308907 is an apocalyptic number.

18308907 is a deficient number, since it is larger than the sum of its proper divisors (8253837).

18308907 is a wasteful number, since it uses less digits than its factorization.

18308907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970 (or 8967 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18308907 is about 4278.8908609592. The cubic root of 18308907 is about 263.5648392323.

The spelling of 18308907 in words is "eighteen million, three hundred eight thousand, nine hundred seven".