20706163399 has 2 divisors, whose sum is σ = 20706163400. Its totient is φ = 20706163398.

The previous prime is 20706163391. The next prime is 20706163403. The reversal of 20706163399 is 99336160702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20706163399 - 2³ = 20706163391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20706163391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10353081699 + 10353081700.

It is an arithmetic number, because the mean of its divisors is an integer number (10353081700).

Almost surely, 2^20706163399 is an apocalyptic number.

20706163399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20706163399 is an equidigital number, since it uses as much as digits as its factorization.

20706163399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 46.

The spelling of 20706163399 in words is "twenty billion, seven hundred six million, one hundred sixty-three thousand, three hundred ninety-nine".