220431020 has 24 divisors (see below), whose sum is σ = 463579200. Its totient is φ = 88044032.

The previous prime is 220430981. The next prime is 220431023. The reversal of 220431020 is 20134022.

It is a junction number, because it is equal to n+sod(n) for n = 220430986 and 220431004.

It is not an unprimeable number, because it can be changed into a prime (220431023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6716 + ... + 22044.

It is an arithmetic number, because the mean of its divisors is an integer number (19315800).

Almost surely, 2^220431020 is an apocalyptic number.

220431020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220431020 is an abundant number, since it is smaller than the sum of its proper divisors (243148180).

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

220431020 is a wasteful number, since it uses less digits than its factorization.

220431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16057 (or 16055 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220431020 is about 14846.9195458183. The cubic root of 220431020 is about 604.0750568247.

Adding to 220431020 its reverse (20134022), we get a palindrome (240565042).

The spelling of 220431020 in words is "two hundred twenty million, four hundred thirty-one thousand, twenty".