18083987413 has 2 divisors, whose sum is σ = 18083987414. Its totient is φ = 18083987412.

The previous prime is 18083987357. The next prime is 18083987437. The reversal of 18083987413 is 31478938081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14290289764 + 3793697649 = 119542^2 + 61593^2 .

It is a cyclic number.

It is not a de Polignac number, because 18083987413 - 2⁹ = 18083986901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18083987513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9041993706 + 9041993707.

It is an arithmetic number, because the mean of its divisors is an integer number (9041993707).

Almost surely, 2^18083987413 is an apocalyptic number.

It is an amenable number.

18083987413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18083987413 is an equidigital number, since it uses as much as digits as its factorization.

18083987413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 18083987413 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, four hundred thirteen".