18125407 has 2 divisors, whose sum is σ = 18125408. Its totient is φ = 18125406.

The previous prime is 18125381. The next prime is 18125413. The reversal of 18125407 is 70452181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18125407 - 2⁷ = 18125279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18125467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062703 + 9062704.

It is an arithmetic number, because the mean of its divisors is an integer number (9062704).

Almost surely, 2^18125407 is an apocalyptic number.

18125407 is a deficient number, since it is larger than the sum of its proper divisors (1).

18125407 is an equidigital number, since it uses as much as digits as its factorization.

18125407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18125407 is about 4257.3943909391. The cubic root of 18125407 is about 262.6813597803.

Adding to 18125407 its reverse (70452181), we get a palindrome (88577588).

The spelling of 18125407 in words is "eighteen million, one hundred twenty-five thousand, four hundred seven".