20022210 has 96 divisors (see below), whose sum is σ = 56936880. Its totient is φ = 4852224.

The previous prime is 20022203. The next prime is 20022229. The reversal of 20022210 is 1222002.

It can be written as a sum of positive squares in 8 ways, for example, as 4835601 + 15186609 = 2199^2 + 3897^2 .

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 = 20022192 and 20022201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127452 + ... + 127608.

Almost surely, 2^20022210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20022210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28468440).

20022210 is an abundant number, since it is smaller than the sum of its proper divisors (36914670).

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

20022210 is a wasteful number, since it uses less digits than its factorization.

20022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20022210 is about 4474.6184194856. The cubic root of 20022210 is about 271.5422031807.

Adding to 20022210 its reverse (1222002), we get a palindrome (21244212).

The spelling of 20022210 in words is "twenty million, twenty-two thousand, two hundred ten".