2222222220 has 72 divisors (see below), whose sum is σ = 6922943664. Its totient is φ = 576574848.

The previous prime is 2222222137. The next prime is 2222222243. The reversal of 2222222220 is 222222222.

2222222220 is a `hidden beast` number, since 2 + 222 + 222 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 2222222193 and 2222222202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160174 + ... + 173493.

Almost surely, 2^2222222220 is an apocalyptic number.

2222222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222222220 is an abundant number, since it is smaller than the sum of its proper divisors (4700721444).

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

2222222220 is a wasteful number, since it uses less digits than its factorization.

2222222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333719 (or 333714 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 2222222220 is about 47140.4520555329. The cubic root of 2222222220 is about 1304.9558799546.

Adding to 2222222220 its reverse (222222222), we get a palindrome (2444444442).

It can be divided in two parts, 2 and 222222220, that added together give a palindrome (222222222).

The spelling of 2222222220 in words is "two billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty".