220989518 has 4 divisors (see below), whose sum is σ = 331484280. Its totient is φ = 110494758.

The previous prime is 220989481. The next prime is 220989521. The reversal of 220989518 is 815989022.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 55247378 + ... + 55247381.

It is an arithmetic number, because the mean of its divisors is an integer number (82871070).

Almost surely, 2^220989518 is an apocalyptic number.

220989518 is a deficient number, since it is larger than the sum of its proper divisors (110494762).

220989518 is a wasteful number, since it uses less digits than its factorization.

220989518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110494761.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 220989518 is about 14865.7161953267. The cubic root of 220989518 is about 604.5848008407.

The spelling of 220989518 in words is "two hundred twenty million, nine hundred eighty-nine thousand, five hundred eighteen".