20022122220 has 24 divisors (see below), whose sum is σ = 56061942384. Its totient is φ = 5339232576.

The previous prime is 20022122213. The next prime is 20022122221. The reversal of 20022122220 is 2222122002.

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 20022122220.

It is not an unprimeable number, because it can be changed into a prime (20022122221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166850959 + ... + 166851078.

It is an arithmetic number, because the mean of its divisors is an integer number (2335914266).

Almost surely, 2^20022122220 is an apocalyptic number.

20022122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022122220 is an abundant number, since it is smaller than the sum of its proper divisors (36039820164).

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

20022122220 is a wasteful number, since it uses less digits than its factorization.

20022122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333702049 (or 333702047 counting only the distinct ones).

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

Adding to 20022122220 its reverse (2222122002), we get a palindrome (22244244222).

The spelling of 20022122220 in words is "twenty billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty".