20902092791 has 2 divisors, whose sum is σ = 20902092792. Its totient is φ = 20902092790.

The previous prime is 20902092779. The next prime is 20902092817. The reversal of 20902092791 is 19729020902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20902092791 - 2³⁰ = 19828350967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20902092721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10451046395 + 10451046396.

It is an arithmetic number, because the mean of its divisors is an integer number (10451046396).

Almost surely, 2^20902092791 is an apocalyptic number.

20902092791 is a deficient number, since it is larger than the sum of its proper divisors (1).

20902092791 is an equidigital number, since it uses as much as digits as its factorization.

20902092791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 20902092791 in words is "twenty billion, nine hundred two million, ninety-two thousand, seven hundred ninety-one".