20040736 has 24 divisors (see below), whose sum is σ = 39716460. Its totient is φ = 9954048.

The previous prime is 20040733. The next prime is 20040737. The reversal of 20040736 is 63704002.

It can be written as a sum of positive squares in 2 ways, for example, as 19749136 + 291600 = 4444^2 + 540^2 .

It is not an unprimeable number, because it can be changed into a prime (20040733) 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, 3030 + ... + 7018.

Almost surely, 2^20040736 is an apocalyptic number.

It is an amenable number.

20040736 is a deficient number, since it is larger than the sum of its proper divisors (19675724).

20040736 is a wasteful number, since it uses less digits than its factorization.

20040736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156 (or 4148 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20040736 is about 4476.6880615026. The cubic root of 20040736 is about 271.6259275397.

Adding to 20040736 its reverse (63704002), we get a palindrome (83744738).

The spelling of 20040736 in words is "twenty million, forty thousand, seven hundred thirty-six".