20036644 has 12 divisors (see below), whose sum is σ = 35095984. Its totient is φ = 10009224.

The previous prime is 20036629. The next prime is 20036677. The reversal of 20036644 is 44663002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6127 + ... + 8809.

Almost surely, 2^20036644 is an apocalyptic number.

It is an amenable number.

20036644 is a deficient number, since it is larger than the sum of its proper divisors (15059340).

20036644 is a wasteful number, since it uses less digits than its factorization.

20036644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554 (or 4552 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20036644 is about 4476.2310038692. The cubic root of 20036644 is about 271.6074390479.

Adding to 20036644 its reverse (44663002), we get a palindrome (64699646).

The spelling of 20036644 in words is "twenty million, thirty-six thousand, six hundred forty-four".