20116220 has 24 divisors (see below), whose sum is σ = 42530208. Its totient is φ = 7992000.

The previous prime is 20116211. The next prime is 20116249. The reversal of 20116220 is 2261102.

It is a junction number, because it is equal to n+sod(n) for n = 20116195 and 20116204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (1772092).

Almost surely, 2^20116220 is an apocalyptic number.

20116220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20116220 is an abundant number, since it is smaller than the sum of its proper divisors (22413988).

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

20116220 is a wasteful number, since it uses less digits than its factorization.

20116220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6821 (or 6819 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20116220 is about 4485.1109239349. The cubic root of 20116220 is about 271.9665291859.

Adding to 20116220 its reverse (2261102), we get a palindrome (22377322).

The spelling of 20116220 in words is "twenty million, one hundred sixteen thousand, two hundred twenty".