20223112991 has 2 divisors, whose sum is σ = 20223112992. Its totient is φ = 20223112990.

The previous prime is 20223112981. The next prime is 20223113033. The reversal of 20223112991 is 19921132202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20223112991 - 2³⁴ = 3043243807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20223112951) 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, 10111556495 + 10111556496.

It is an arithmetic number, because the mean of its divisors is an integer number (10111556496).

Almost surely, 2^20223112991 is an apocalyptic number.

20223112991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20223112991 is an equidigital number, since it uses as much as digits as its factorization.

20223112991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 20223112991 in words is "twenty billion, two hundred twenty-three million, one hundred twelve thousand, nine hundred ninety-one".