20846269399 has 2 divisors, whose sum is σ = 20846269400. Its totient is φ = 20846269398.

The previous prime is 20846269343. The next prime is 20846269421. The reversal of 20846269399 is 99396264802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20846269399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20846269099) 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, 10423134699 + 10423134700.

It is an arithmetic number, because the mean of its divisors is an integer number (10423134700).

Almost surely, 2^20846269399 is an apocalyptic number.

20846269399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20846269399 is an equidigital number, since it uses as much as digits as its factorization.

20846269399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 58.

The spelling of 20846269399 in words is "twenty billion, eight hundred forty-six million, two hundred sixty-nine thousand, three hundred ninety-nine".