220644023 has 2 divisors, whose sum is σ = 220644024. Its totient is φ = 220644022.

The previous prime is 220643999. The next prime is 220644031. The reversal of 220644023 is 320446022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220644023 - 2²⁰ = 219595447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220644023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220644043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110322011 + 110322012.

It is an arithmetic number, because the mean of its divisors is an integer number (110322012).

Almost surely, 2^220644023 is an apocalyptic number.

220644023 is a deficient number, since it is larger than the sum of its proper divisors (1).

220644023 is an equidigital number, since it uses as much as digits as its factorization.

220644023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 220644023 is about 14854.0911199575. The cubic root of 220644023 is about 604.2695672236.

The spelling of 220644023 in words is "two hundred twenty million, six hundred forty-four thousand, twenty-three".