220989923 has 16 divisors (see below), whose sum is σ = 277808640. Its totient is φ = 172192680.

The previous prime is 220989871. The next prime is 220989929. The reversal of 220989923 is 329989022.

It is not a de Polignac number, because 220989923 - 2¹⁴ = 220973539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220989929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2543 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (17363040).

Almost surely, 2^220989923 is an apocalyptic number.

220989923 is a deficient number, since it is larger than the sum of its proper divisors (56818717).

220989923 is an equidigital number, since it uses as much as digits as its factorization.

220989923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23759 (or 23737 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 220989923 is about 14865.7298172676. The cubic root of 220989923 is about 604.5851701745.

The spelling of 220989923 in words is "two hundred twenty million, nine hundred eighty-nine thousand, nine hundred twenty-three".