18313907 has 2 divisors, whose sum is σ = 18313908. Its totient is φ = 18313906.

The previous prime is 18313903. The next prime is 18313949. The reversal of 18313907 is 70931381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18313907 - 2² = 18313903 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18313903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9156953 + 9156954.

It is an arithmetic number, because the mean of its divisors is an integer number (9156954).

Almost surely, 2^18313907 is an apocalyptic number.

18313907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18313907 is an equidigital number, since it uses as much as digits as its factorization.

18313907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 18313907 is about 4279.4750846336. The cubic root of 18313907 is about 263.5888294547.

The spelling of 18313907 in words is "eighteen million, three hundred thirteen thousand, nine hundred seven".