20032220 has 24 divisors (see below), whose sum is σ = 45304224. Its totient is φ = 7396416.

The previous prime is 20032193. The next prime is 20032237. The reversal of 20032220 is 2223002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38264 + ... + 38783.

It is an arithmetic number, because the mean of its divisors is an integer number (1887676).

Almost surely, 2^20032220 is an apocalyptic number.

20032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20032220 is an abundant number, since it is smaller than the sum of its proper divisors (25272004).

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

20032220 is a wasteful number, since it uses less digits than its factorization.

20032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77069 (or 77067 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 20032220 is about 4475.7368108503. The cubic root of 20032220 is about 271.5874476801.

Adding to 20032220 its reverse (2223002), we get a palindrome (22255222).

The spelling of 20032220 in words is "twenty million, thirty-two thousand, two hundred twenty".