20440012 has 12 divisors (see below), whose sum is σ = 37003680. Its totient is φ = 9867536.

The previous prime is 20439959. The next prime is 20440039. The reversal of 20440012 is 21004402.

It is a junction number, because it is equal to n+sod(n) for n = 20439974 and 20440001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87988 + ... + 88219.

It is an arithmetic number, because the mean of its divisors is an integer number (3083640).

Almost surely, 2^20440012 is an apocalyptic number.

It is an amenable number.

20440012 is a deficient number, since it is larger than the sum of its proper divisors (16563668).

20440012 is a wasteful number, since it uses less digits than its factorization.

20440012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176240 (or 176238 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20440012 is about 4521.0631493046. The cubic root of 20440012 is about 273.4179663891.

Adding to 20440012 its reverse (21004402), we get a palindrome (41444414).

The spelling of 20440012 in words is "twenty million, four hundred forty thousand, twelve".