220021880 has 64 divisors (see below), whose sum is σ = 550368000. Its totient is φ = 78612480.

The previous prime is 220021861. The next prime is 220021889. The reversal of 220021880 is 88120022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021889) 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, 9296 + ... + 22944.

It is an arithmetic number, because the mean of its divisors is an integer number (8599500).

Almost surely, 2^220021880 is an apocalyptic number.

220021880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220021880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275184000).

220021880 is an abundant number, since it is smaller than the sum of its proper divisors (330346120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220021880 is a wasteful number, since it uses less digits than its factorization.

220021880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13704 (or 13700 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 220021880 is about 14833.1345305030. The cubic root of 220021880 is about 603.7010859586.

The spelling of 220021880 in words is "two hundred twenty million, twenty-one thousand, eight hundred eighty".