20869545799 has 2 divisors, whose sum is σ = 20869545800. Its totient is φ = 20869545798.

The previous prime is 20869545791. The next prime is 20869545841. The reversal of 20869545799 is 99754596802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20869545799 - 2³ = 20869545791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20869545799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20869545791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10434772899 + 10434772900.

It is an arithmetic number, because the mean of its divisors is an integer number (10434772900).

Almost surely, 2^20869545799 is an apocalyptic number.

20869545799 is a deficient number, since it is larger than the sum of its proper divisors (1).

20869545799 is an equidigital number, since it uses as much as digits as its factorization.

20869545799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48988800, while the sum is 64.

The spelling of 20869545799 in words is "twenty billion, eight hundred sixty-nine million, five hundred forty-five thousand, seven hundred ninety-nine".