220420009 has 4 divisors (see below), whose sum is σ = 220452804. Its totient is φ = 220387216.

The previous prime is 220420003. The next prime is 220420043. The reversal of 220420009 is 900024022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900024022 = 2 ⋅450012011.

It can be written as a sum of positive squares in 2 ways, for example, as 153834409 + 66585600 = 12403^2 + 8160^2 .

It is a cyclic number.

It is not a de Polignac number, because 220420009 - 2³ = 220420001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220420001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242 + ... + 21115.

It is an arithmetic number, because the mean of its divisors is an integer number (55113201).

Almost surely, 2^220420009 is an apocalyptic number.

It is an amenable number.

220420009 is a deficient number, since it is larger than the sum of its proper divisors (32795).

220420009 is an equidigital number, since it uses as much as digits as its factorization.

220420009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32794.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 220420009 is about 14846.5487235249. The cubic root of 220420009 is about 604.0649983776.

The spelling of 220420009 in words is "two hundred twenty million, four hundred twenty thousand, nine".