20903696399 has 2 divisors, whose sum is σ = 20903696400. Its totient is φ = 20903696398.

The previous prime is 20903696369. The next prime is 20903696413. The reversal of 20903696399 is 99369630902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20903696399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20903696309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10451848199 + 10451848200.

It is an arithmetic number, because the mean of its divisors is an integer number (10451848200).

Almost surely, 2^20903696399 is an apocalyptic number.

20903696399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20903696399 is an equidigital number, since it uses as much as digits as its factorization.

20903696399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 56.

The spelling of 20903696399 in words is "twenty billion, nine hundred three million, six hundred ninety-six thousand, three hundred ninety-nine".