20221020949 has 2 divisors, whose sum is σ = 20221020950. Its totient is φ = 20221020948.

The previous prime is 20221020917. The next prime is 20221020977. The reversal of 20221020949 is 94902012202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18528109924 + 1692911025 = 136118^2 + 41145^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221020949 - 2⁵ = 20221020917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20221020949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221021949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110510474 + 10110510475.

It is an arithmetic number, because the mean of its divisors is an integer number (10110510475).

Almost surely, 2^20221020949 is an apocalyptic number.

It is an amenable number.

20221020949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221020949 is an equidigital number, since it uses as much as digits as its factorization.

20221020949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 20221020949 in words is "twenty billion, two hundred twenty-one million, twenty thousand, nine hundred forty-nine".