20221967291 has 2 divisors, whose sum is σ = 20221967292. Its totient is φ = 20221967290.

The previous prime is 20221967257. The next prime is 20221967317. The reversal of 20221967291 is 19276912202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20221967291 - 2¹⁰ = 20221966267 is a prime.

It is a super-2 number, since 2×20221967291² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20221967221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110983645 + 10110983646.

It is an arithmetic number, because the mean of its divisors is an integer number (10110983646).

Almost surely, 2^20221967291 is an apocalyptic number.

20221967291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221967291 is an equidigital number, since it uses as much as digits as its factorization.

20221967291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 20221967291 in words is "twenty billion, two hundred twenty-one million, nine hundred sixty-seven thousand, two hundred ninety-one".