20440322 has 16 divisors (see below), whose sum is σ = 35099520. Its totient is φ = 8745408.

The previous prime is 20440319. The next prime is 20440337. The reversal of 20440322 is 22304402.

It is a self number, because there is not a number n which added to its sum of digits gives 20440322.

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, 13403 + ... + 14849.

It is an arithmetic number, because the mean of its divisors is an integer number (2193720).

Almost surely, 2^20440322 is an apocalyptic number.

20440322 is a deficient number, since it is larger than the sum of its proper divisors (14659198).

20440322 is a wasteful number, since it uses less digits than its factorization.

20440322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20440322 is about 4521.0974331461. The cubic root of 20440322 is about 273.4193486313.

Adding to 20440322 its reverse (22304402), we get a palindrome (42744724).

The spelling of 20440322 in words is "twenty million, four hundred forty thousand, three hundred twenty-two".