220551841920 has 512 divisors, whose sum is σ = 787467744000. Its totient is φ = 52178190336.

The previous prime is 220551841879. The next prime is 220551841921. The reversal of 220551841920 is 29148155022.

It is a super-2 number, since 2×220551841920² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220551841921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142015864 + ... + 142017416.

Almost surely, 2^220551841920 is an apocalyptic number.

220551841920 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 220551841920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393733872000).

220551841920 is an abundant number, since it is smaller than the sum of its proper divisors (566915902080).

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

220551841920 is a wasteful number, since it uses less digits than its factorization.

220551841920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

Adding to 220551841920 its reverse (29148155022), we get a palindrome (249699996942).

The spelling of 220551841920 in words is "two hundred twenty billion, five hundred fifty-one million, eight hundred forty-one thousand, nine hundred twenty".