20318699 has 2 divisors, whose sum is σ = 20318700. Its totient is φ = 20318698.

The previous prime is 20318681. The next prime is 20318731. The reversal of 20318699 is 99681302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20318699 - 2⁸ = 20318443 is a prime.

It is not a weakly prime, because it can be changed into another prime (20318659) 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, 10159349 + 10159350.

It is an arithmetic number, because the mean of its divisors is an integer number (10159350).

Almost surely, 2^20318699 is an apocalyptic number.

20318699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20318699 is an equidigital number, since it uses as much as digits as its factorization.

20318699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 20318699 is about 4507.6267591716. The cubic root of 20318699 is about 272.8759740221.

The spelling of 20318699 in words is "twenty million, three hundred eighteen thousand, six hundred ninety-nine".