20044651 has 4 divisors (see below), whose sum is σ = 21866904. Its totient is φ = 18222400.

The previous prime is 20044637. The next prime is 20044657. The reversal of 20044651 is 15644002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20044651 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20044657) 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, 911110 + ... + 911131.

It is an arithmetic number, because the mean of its divisors is an integer number (5466726).

Almost surely, 2^20044651 is an apocalyptic number.

20044651 is a deficient number, since it is larger than the sum of its proper divisors (1822253).

20044651 is a wasteful number, since it uses less digits than its factorization.

20044651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822252.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20044651 is about 4477.1253053717. The cubic root of 20044651 is about 271.6436139538.

Adding to 20044651 its reverse (15644002), we get a palindrome (35688653).

The spelling of 20044651 in words is "twenty million, forty-four thousand, six hundred fifty-one".