18379901 has 2 divisors, whose sum is σ = 18379902. Its totient is φ = 18379900.

The previous prime is 18379891. The next prime is 18379913. The reversal of 18379901 is 10997381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11383876 + 6996025 = 3374^2 + 2645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18379901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18379981) 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, 9189950 + 9189951.

It is an arithmetic number, because the mean of its divisors is an integer number (9189951).

Almost surely, 2^18379901 is an apocalyptic number.

It is an amenable number.

18379901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18379901 is an equidigital number, since it uses as much as digits as its factorization.

18379901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 18379901 is about 4287.1786760059. The cubic root of 18379901 is about 263.9050632393.

The spelling of 18379901 in words is "eighteen million, three hundred seventy-nine thousand, nine hundred one".