20440231222 has 4 divisors (see below), whose sum is σ = 30660346836. Its totient is φ = 10220115610.

The previous prime is 20440231219. The next prime is 20440231237. The reversal of 20440231222 is 22213204402.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20440231222² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20440231193 and 20440231202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110057804 + ... + 5110057807.

It is an arithmetic number, because the mean of its divisors is an integer number (7665086709).

Almost surely, 2^20440231222 is an apocalyptic number.

20440231222 is a deficient number, since it is larger than the sum of its proper divisors (10220115614).

20440231222 is a wasteful number, since it uses less digits than its factorization.

20440231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220115613.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20440231222 its reverse (22213204402), we get a palindrome (42653435624).

The spelling of 20440231222 in words is "twenty billion, four hundred forty million, two hundred thirty-one thousand, two hundred twenty-two".