18125507 has 2 divisors, whose sum is σ = 18125508. Its totient is φ = 18125506.

The previous prime is 18125477. The next prime is 18125531. The reversal of 18125507 is 70552181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18125507 - 2⁸ = 18125251 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18125507.

It is not a weakly prime, because it can be changed into another prime (18125407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062753 + 9062754.

It is an arithmetic number, because the mean of its divisors is an integer number (9062754).

Almost surely, 2^18125507 is an apocalyptic number.

18125507 is a deficient number, since it is larger than the sum of its proper divisors (1).

18125507 is an equidigital number, since it uses as much as digits as its factorization.

18125507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 18125507 is about 4257.4061351955. The cubic root of 18125507 is about 262.6818428607.

Adding to 18125507 its reverse (70552181), we get a palindrome (88677688).

The spelling of 18125507 in words is "eighteen million, one hundred twenty-five thousand, five hundred seven".