20440744 has 16 divisors (see below), whose sum is σ = 39993120. Its totient is φ = 9775920.

The previous prime is 20440741. The next prime is 20440747. The reversal of 20440744 is 44704402.

It is an interprime number because it is at equal distance from previous prime (20440741) and next prime (20440747).

It is not an unprimeable number, because it can be changed into a prime (20440741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55362 + ... + 55729.

It is an arithmetic number, because the mean of its divisors is an integer number (2499570).

Almost surely, 2^20440744 is an apocalyptic number.

It is an amenable number.

20440744 is a deficient number, since it is larger than the sum of its proper divisors (19552376).

20440744 is a wasteful number, since it uses less digits than its factorization.

20440744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111120 (or 111116 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 20440744 is about 4521.1441029899. The cubic root of 20440744 is about 273.4212302418.

The spelling of 20440744 in words is "twenty million, four hundred forty thousand, seven hundred forty-four".