20330220 has 48 divisors (see below), whose sum is σ = 57899520. Its totient is φ = 5328576.

The previous prime is 20330207. The next prime is 20330237. The reversal of 20330220 is 2203302.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20330196 and 20330205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 669 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (1206240).

Almost surely, 2^20330220 is an apocalyptic number.

20330220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20330220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28949760).

20330220 is an abundant number, since it is smaller than the sum of its proper divisors (37569300).

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

20330220 is a wasteful number, since it uses less digits than its factorization.

20330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5814 (or 5812 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20330220 is about 4508.9045232739. The cubic root of 20330220 is about 272.9275391689.

Adding to 20330220 its reverse (2203302), we get a palindrome (22533522).

The spelling of 20330220 in words is "twenty million, three hundred thirty thousand, two hundred twenty".