20202222210 has 64 divisors (see below), whose sum is σ = 49187115648. Its totient is φ = 5309397504.

The previous prime is 20202222193. The next prime is 20202222217. The reversal of 20202222210 is 1222220202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20202222210.

It is not an unprimeable number, because it can be changed into a prime (20202222217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3792609 + ... + 3797931.

It is an arithmetic number, because the mean of its divisors is an integer number (768548682).

Almost surely, 2^20202222210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20202222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24593557824).

20202222210 is an abundant number, since it is smaller than the sum of its proper divisors (28984893438).

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

20202222210 is a wasteful number, since it uses less digits than its factorization.

20202222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20202222210 its reverse (1222220202), we get a palindrome (21424442412).

The spelling of 20202222210 in words is "twenty billion, two hundred two million, two hundred twenty-two thousand, two hundred ten".