18313906 has 32 divisors (see below), whose sum is σ = 31026240. Its totient is φ = 8049216.

The previous prime is 18313903. The next prime is 18313907. The reversal of 18313906 is 60931381.

It is not an unprimeable number, because it can be changed into a prime (18313903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80565 + ... + 80791.

It is an arithmetic number, because the mean of its divisors is an integer number (969570).

Almost surely, 2^18313906 is an apocalyptic number.

18313906 is a deficient number, since it is larger than the sum of its proper divisors (12712334).

18313906 is a wasteful number, since it uses less digits than its factorization.

18313906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 18313906 is about 4279.4749677969. The cubic root of 18313906 is about 263.5888246571.

The spelling of 18313906 in words is "eighteen million, three hundred thirteen thousand, nine hundred six".