220404020 has 24 divisors (see below), whose sum is σ = 464844744. Its totient is φ = 87781376.

The previous prime is 220404013. The next prime is 220404053. The reversal of 220404020 is 20404022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 712336 + 219691684 = 844^2 + 14822^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220403986 and 220404004.

It is a congruent number.

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, 18989 + ... + 28308.

It is an arithmetic number, because the mean of its divisors is an integer number (19368531).

Almost surely, 2^220404020 is an apocalyptic number.

220404020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220404020 is an abundant number, since it is smaller than the sum of its proper divisors (244440724).

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

220404020 is a wasteful number, since it uses less digits than its factorization.

220404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47539 (or 47537 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 220404020 is about 14846.0102384445. The cubic root of 220404020 is about 604.0503919771.

Adding to 220404020 its reverse (20404022), we get a palindrome (240808042).

The spelling of 220404020 in words is "two hundred twenty million, four hundred four thousand, twenty".