220021980 has 48 divisors (see below), whose sum is σ = 632718240. Its totient is φ = 57086208.

The previous prime is 220021897. The next prime is 220021981. The reversal of 220021980 is 89120022.

220021980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 220021980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47335 + ... + 51774.

It is an arithmetic number, because the mean of its divisors is an integer number (13181630).

Almost surely, 2^220021980 is an apocalyptic number.

220021980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021980 is an abundant number, since it is smaller than the sum of its proper divisors (412696260).

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

220021980 is a wasteful number, since it uses less digits than its factorization.

220021980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99158 (or 99156 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 220021980 is about 14833.1379013343. The cubic root of 220021980 is about 603.7011774194.

The spelling of 220021980 in words is "two hundred twenty million, twenty-one thousand, nine hundred eighty".