20202210 has 120 divisors (see below), whose sum is σ = 63314460. Its totient is φ = 4608576.

The previous prime is 20202197. The next prime is 20202223. The reversal of 20202210 is 1220202.

It is an interprime number because it is at equal distance from previous prime (20202197) and next prime (20202223).

It can be written as a sum of positive squares in 2 ways, for example, as 20007729 + 194481 = 4473^2 + 441^2 .

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 = 20202192 and 20202201.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 39436 + ... + 39944.

Almost surely, 2^20202210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20202210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31657230).

20202210 is an abundant number, since it is smaller than the sum of its proper divisors (43112250).

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

20202210 is a wasteful number, since it uses less digits than its factorization.

20202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 526 counting only the distinct ones).

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

The square root of 20202210 is about 4494.6868633977. The cubic root of 20202210 is about 272.3534997961.

Adding to 20202210 its reverse (1220202), we get a palindrome (21422412).

The spelling of 20202210 in words is "twenty million, two hundred two thousand, two hundred ten".