20405335199 has 2 divisors, whose sum is σ = 20405335200. Its totient is φ = 20405335198.

The previous prime is 20405335193. The next prime is 20405335207. The reversal of 20405335199 is 99153350402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20405335199 - 2⁴ = 20405335183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20405335193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202667599 + 10202667600.

It is an arithmetic number, because the mean of its divisors is an integer number (10202667600).

Almost surely, 2^20405335199 is an apocalyptic number.

20405335199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20405335199 is an equidigital number, since it uses as much as digits as its factorization.

20405335199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 41.

The spelling of 20405335199 in words is "twenty billion, four hundred five million, three hundred thirty-five thousand, one hundred ninety-nine".