18745007 has 2 divisors, whose sum is σ = 18745008. Its totient is φ = 18745006.

The previous prime is 18744997. The next prime is 18745031. The reversal of 18745007 is 70054781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18745007 - 2²⁰ = 17696431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18745087) 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, 9372503 + 9372504.

It is an arithmetic number, because the mean of its divisors is an integer number (9372504).

Almost surely, 2^18745007 is an apocalyptic number.

18745007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18745007 is an equidigital number, since it uses as much as digits as its factorization.

18745007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18745007 is about 4329.5504385559. The cubic root of 18745007 is about 265.6410586278.

Adding to 18745007 its reverse (70054781), we get a palindrome (88799788).

The spelling of 18745007 in words is "eighteen million, seven hundred forty-five thousand, seven".