20440022 has 4 divisors (see below), whose sum is σ = 30660036. Its totient is φ = 10220010.

The previous prime is 20439959. The next prime is 20440039. The reversal of 20440022 is 22004402.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20439979 and 20440006.

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, 5110004 + ... + 5110007.

It is an arithmetic number, because the mean of its divisors is an integer number (7665009).

Almost surely, 2^20440022 is an apocalyptic number.

20440022 is a deficient number, since it is larger than the sum of its proper divisors (10220014).

20440022 is a wasteful number, since it uses less digits than its factorization.

20440022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220013.

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

The square root of 20440022 is about 4521.0642552390. The cubic root of 20440022 is about 273.4180109778.

Adding to 20440022 its reverse (22004402), we get a palindrome (42444424).

The spelling of 20440022 in words is "twenty million, four hundred forty thousand, twenty-two".