20302220 has 24 divisors (see below), whose sum is σ = 42975744. Its totient is φ = 8055936.

The previous prime is 20302211. The next prime is 20302223. The reversal of 20302220 is 2220302.

It is not an unprimeable number, because it can be changed into a prime (20302223) 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, 1457 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (1790656).

Almost surely, 2^20302220 is an apocalyptic number.

20302220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20302220 is an abundant number, since it is smaller than the sum of its proper divisors (22673524).

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

20302220 is a wasteful number, since it uses less digits than its factorization.

20302220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8129 (or 8127 counting only the distinct ones).

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

The square root of 20302220 is about 4505.7984863951. The cubic root of 20302220 is about 272.8021842029.

Adding to 20302220 its reverse (2220302), we get a palindrome (22522522).

The spelling of 20302220 in words is "twenty million, three hundred two thousand, two hundred twenty".