20440107 has 20 divisors (see below), whose sum is σ = 30677856. Its totient is φ = 13562640.

The previous prime is 20440039. The next prime is 20440109. The reversal of 20440107 is 70104402.

It is a happy number.

It is not a de Polignac number, because 20440107 - 2¹¹ = 20438059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20440107.

It is not an unprimeable number, because it can be changed into a prime (20440109) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21982 + ... + 22892.

Almost surely, 2^20440107 is an apocalyptic number.

20440107 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20440107 is a deficient number, since it is larger than the sum of its proper divisors (10237749).

20440107 is an equidigital number, since it uses as much as digits as its factorization.

20440107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20440107 is about 4521.0736556707. The cubic root of 20440107 is about 273.4183899809.

Adding to 20440107 its reverse (70104402), we get a palindrome (90544509).

The spelling of 20440107 in words is "twenty million, four hundred forty thousand, one hundred seven".