18707413 has 2 divisors, whose sum is σ = 18707414. Its totient is φ = 18707412.

The previous prime is 18707411. The next prime is 18707431. The reversal of 18707413 is 31470781.

Together with next prime (18707431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17114769 + 1592644 = 4137^2 + 1262^2 .

It is an emirp because it is prime and its reverse (31470781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18707413 - 2¹ = 18707411 is a prime.

Together with 18707411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18707411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9353706 + 9353707.

It is an arithmetic number, because the mean of its divisors is an integer number (9353707).

Almost surely, 2^18707413 is an apocalyptic number.

It is an amenable number.

18707413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18707413 is an equidigital number, since it uses as much as digits as its factorization.

18707413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 18707413 is about 4325.2067002630. The cubic root of 18707413 is about 265.4633545322.

The spelling of 18707413 in words is "eighteen million, seven hundred seven thousand, four hundred thirteen".