220488993 has 16 divisors (see below), whose sum is σ = 334248640. Its totient is φ = 143573472.

The previous prime is 220488973. The next prime is 220489039. The reversal of 220488993 is 399884022.

It is not a de Polignac number, because 220488993 - 2⁹ = 220488481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220488973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93796 + ... + 96117.

It is an arithmetic number, because the mean of its divisors is an integer number (20890540).

Almost surely, 2^220488993 is an apocalyptic number.

It is an amenable number.

220488993 is a deficient number, since it is larger than the sum of its proper divisors (113759647).

220488993 is a wasteful number, since it uses less digits than its factorization.

220488993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189965 (or 189959 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 220488993 is about 14848.8717753235. The cubic root of 220488993 is about 604.1280091022.

The spelling of 220488993 in words is "two hundred twenty million, four hundred eighty-eight thousand, nine hundred ninety-three".