20110220 has 24 divisors (see below), whose sum is σ = 45480624. Its totient is φ = 7425216.

The previous prime is 20110217. The next prime is 20110229. The reversal of 20110220 is 2201102.

It is a junction number, because it is equal to n+sod(n) for n = 20110198 and 20110207.

It is not an unprimeable number, because it can be changed into a prime (20110229) by changing a digit.

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, 38414 + ... + 38933.

It is an arithmetic number, because the mean of its divisors is an integer number (1895026).

Almost surely, 2^20110220 is an apocalyptic number.

20110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110220 is an abundant number, since it is smaller than the sum of its proper divisors (25370404).

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

20110220 is a wasteful number, since it uses less digits than its factorization.

20110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77369 (or 77367 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20110220 is about 4484.4419942731. The cubic root of 20110220 is about 271.9394869709.

Adding to 20110220 its reverse (2201102), we get a palindrome (22311322).

The spelling of 20110220 in words is "twenty million, one hundred ten thousand, two hundred twenty".