18406607 has 2 divisors, whose sum is σ = 18406608. Its totient is φ = 18406606.

The previous prime is 18406571. The next prime is 18406621. The reversal of 18406607 is 70660481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18406607 - 2⁸ = 18406351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18406627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9203303 + 9203304.

It is an arithmetic number, because the mean of its divisors is an integer number (9203304).

Almost surely, 2^18406607 is an apocalyptic number.

18406607 is a deficient number, since it is larger than the sum of its proper divisors (1).

18406607 is an equidigital number, since it uses as much as digits as its factorization.

18406607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18406607 is about 4290.2921811923. The cubic root of 18406607 is about 264.0328194200.

The spelling of 18406607 in words is "eighteen million, four hundred six thousand, six hundred seven".