20112210 has 24 divisors (see below), whose sum is σ = 52291980. Its totient is φ = 5363232.

The previous prime is 20112199. The next prime is 20112217. The reversal of 20112210 is 1221102.

It can be written as a sum of positive squares in 2 ways, for example, as 19421649 + 690561 = 4407^2 + 831^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20112192 and 20112201.

It is not an unprimeable number, because it can be changed into a prime (20112217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111645 + ... + 111824.

Almost surely, 2^20112210 is an apocalyptic number.

20112210 is an abundant number, since it is smaller than the sum of its proper divisors (32179770).

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

20112210 is a wasteful number, since it uses less digits than its factorization.

20112210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223482 (or 223479 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 20112210 is about 4484.6638670027. The cubic root of 20112210 is about 271.9484565683.

Adding to 20112210 its reverse (1221102), we get a palindrome (21333312).

The spelling of 20112210 in words is "twenty million, one hundred twelve thousand, two hundred ten".