22222040420 has 24 divisors (see below), whose sum is σ = 46670326584. Its totient is φ = 8888046336.

The previous prime is 22222040417. The next prime is 22222040431. The reversal of 22222040420 is 2404022222.

It can be written as a sum of positive squares in 4 ways, for example, as 3007644964 + 19214395456 = 54842^2 + 138616^2 .

It is a super-2 number, since 2×22222040420² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22222040392 and 22222040401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226934 + ... + 309746.

It is an arithmetic number, because the mean of its divisors is an integer number (1944596941).

Almost surely, 2^22222040420 is an apocalyptic number.

22222040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222040420 is an abundant number, since it is smaller than the sum of its proper divisors (24448286164).

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

22222040420 is a wasteful number, since it uses less digits than its factorization.

22222040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96239 (or 96237 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22222040420 its reverse (2404022222), we get a palindrome (24626062642).

The spelling of 22222040420 in words is "twenty-two billion, two hundred twenty-two million, forty thousand, four hundred twenty".