20400140200399 has 2 divisors, whose sum is σ = 20400140200400. Its totient is φ = 20400140200398.

The previous prime is 20400140200393. The next prime is 20400140200417. The reversal of 20400140200399 is 99300204100402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20400140200399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20400140200393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200070100199 + 10200070100200.

It is an arithmetic number, because the mean of its divisors is an integer number (10200070100200).

Almost surely, 2^{20400140200399} is an apocalyptic number.

20400140200399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400140200399 is an equidigital number, since it uses as much as digits as its factorization.

20400140200399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 20400140200399 in words is "twenty trillion, four hundred billion, one hundred forty million, two hundred thousand, three hundred ninety-nine".