20407998873599 has 2 divisors, whose sum is σ = 20407998873600. Its totient is φ = 20407998873598.

The previous prime is 20407998873547. The next prime is 20407998873601. The reversal of 20407998873599 is 99537889970402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20407998873599 is a prime.

It is a Sophie Germain prime.

Together with 20407998873601, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20407998875599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10203999436799 + 10203999436800.

It is an arithmetic number, because the mean of its divisors is an integer number (10203999436800).

Almost surely, 2^{20407998873599} is an apocalyptic number.

20407998873599 is a deficient number, since it is larger than the sum of its proper divisors (1).

20407998873599 is an equidigital number, since it uses as much as digits as its factorization.

20407998873599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469035520, while the sum is 80.

The spelling of 20407998873599 in words is "twenty trillion, four hundred seven billion, nine hundred ninety-eight million, eight hundred seventy-three thousand, five hundred ninety-nine".