18930907 has 2 divisors, whose sum is σ = 18930908. Its totient is φ = 18930906.

The previous prime is 18930893. The next prime is 18930931. The reversal of 18930907 is 70903981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18930907 - 2¹¹ = 18928859 is a prime.

It is a super-3 number, since 3×18930907³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18930407) 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 as a sum of consecutive naturals, namely, 9465453 + 9465454.

It is an arithmetic number, because the mean of its divisors is an integer number (9465454).

Almost surely, 2^18930907 is an apocalyptic number.

18930907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18930907 is an equidigital number, since it uses as much as digits as its factorization.

18930907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 18930907 is about 4350.9662145321. The cubic root of 18930907 is about 266.5163195903.

The spelling of 18930907 in words is "eighteen million, nine hundred thirty thousand, nine hundred seven".