18700007 has 2 divisors, whose sum is σ = 18700008. Its totient is φ = 18700006.

The previous prime is 18700001. The next prime is 18700013. The reversal of 18700007 is 70000781.

It is a balanced prime because it is at equal distance from previous prime (18700001) and next prime (18700013).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18700007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18700001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350003 + 9350004.

It is an arithmetic number, because the mean of its divisors is an integer number (9350004).

Almost surely, 2^18700007 is an apocalyptic number.

18700007 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700007 is an equidigital number, since it uses as much as digits as its factorization.

18700007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 18700007 is about 4324.3504714581. The cubic root of 18700007 is about 265.4283188469.

Adding to 18700007 its reverse (70000781), we get a palindrome (88700788).

The spelling of 18700007 in words is "eighteen million, seven hundred thousand, seven".