20996922851 has 2 divisors, whose sum is σ = 20996922852. Its totient is φ = 20996922850.

The previous prime is 20996922841. The next prime is 20996922871. The reversal of 20996922851 is 15822969902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20996922851 - 2⁶ = 20996922787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20996922793 and 20996922802.

It is not a weakly prime, because it can be changed into another prime (20996922841) 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, 10498461425 + 10498461426.

It is an arithmetic number, because the mean of its divisors is an integer number (10498461426).

Almost surely, 2^20996922851 is an apocalyptic number.

20996922851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20996922851 is an equidigital number, since it uses as much as digits as its factorization.

20996922851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 20996922851 in words is "twenty billion, nine hundred ninety-six million, nine hundred twenty-two thousand, eight hundred fifty-one".