20332218 has 16 divisors (see below), whose sum is σ = 41976576. Its totient is φ = 6558720.

The previous prime is 20332217. The next prime is 20332229. The reversal of 20332218 is 81223302.

It is a junction number, because it is equal to n+sod(n) for n = 20332194 and 20332203.

It is not an unprimeable number, because it can be changed into a prime (20332211) 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, 54471 + ... + 54842.

It is an arithmetic number, because the mean of its divisors is an integer number (2623536).

Almost surely, 2^20332218 is an apocalyptic number.

20332218 is an abundant number, since it is smaller than the sum of its proper divisors (21644358).

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

20332218 is a wasteful number, since it uses less digits than its factorization.

20332218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109349.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20332218 is about 4509.1260794083. The cubic root of 20332218 is about 272.9364797405.

The spelling of 20332218 in words is "twenty million, three hundred thirty-two thousand, two hundred eighteen".