20413402121999 has 2 divisors, whose sum is σ = 20413402122000. Its totient is φ = 20413402121998.

The previous prime is 20413402121909. The next prime is 20413402122041. The reversal of 20413402121999 is 99912120431402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20413402121999 - 2²⁰ = 20413401073423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413402121909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206701060999 + 10206701061000.

It is an arithmetic number, because the mean of its divisors is an integer number (10206701061000).

Almost surely, 2^{20413402121999} is an apocalyptic number.

20413402121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413402121999 is an equidigital number, since it uses as much as digits as its factorization.

20413402121999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 20413402121999 in words is "twenty trillion, four hundred thirteen billion, four hundred two million, one hundred twenty-one thousand, nine hundred ninety-nine".