220311020 has 24 divisors (see below), whose sum is σ = 482769504. Its totient is φ = 84292736.

The previous prime is 220311019. The next prime is 220311067. The reversal of 220311020 is 20113022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 220310992 and 220311010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239009 + ... + 239928.

It is an arithmetic number, because the mean of its divisors is an integer number (20115396).

Almost surely, 2^220311020 is an apocalyptic number.

220311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220311020 is an abundant number, since it is smaller than the sum of its proper divisors (262458484).

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

220311020 is a wasteful number, since it uses less digits than its factorization.

220311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478969 (or 478967 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 220311020 is about 14842.8777533199. The cubic root of 220311020 is about 603.9654198585.

Adding to 220311020 its reverse (20113022), we get a palindrome (240424042).

The spelling of 220311020 in words is "two hundred twenty million, three hundred eleven thousand, twenty".