20002222220 has 24 divisors (see below), whose sum is σ = 42031538304. Its totient is φ = 7995770496.

The previous prime is 20002222213. The next prime is 20002222223. The reversal of 20002222220 is 2222220002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20002222195 and 20002222204.

It is not an unprimeable number, because it can be changed into a prime (20002222223) 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, 287777 + ... + 350456.

It is an arithmetic number, because the mean of its divisors is an integer number (1751314096).

Almost surely, 2^20002222220 is an apocalyptic number.

20002222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002222220 is an abundant number, since it is smaller than the sum of its proper divisors (22029316084).

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

20002222220 is a wasteful number, since it uses less digits than its factorization.

20002222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639809 (or 639807 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20002222220 its reverse (2222220002), we get a palindrome (22224442222).

The spelling of 20002222220 in words is "twenty billion, two million, two hundred twenty-two thousand, two hundred twenty".