20799071 has 2 divisors, whose sum is σ = 20799072. Its totient is φ = 20799070.

The previous prime is 20799049. The next prime is 20799073. The reversal of 20799071 is 17099702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20799071 - 2¹⁸ = 20536927 is a prime.

Together with 20799073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20799073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399535 + 10399536.

It is an arithmetic number, because the mean of its divisors is an integer number (10399536).

Almost surely, 2^20799071 is an apocalyptic number.

20799071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20799071 is an equidigital number, since it uses as much as digits as its factorization.

20799071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 20799071 is about 4560.5998508968. The cubic root of 20799071 is about 275.0096789982.

The spelling of 20799071 in words is "twenty million, seven hundred ninety-nine thousand, seventy-one".