20043663 has 8 divisors (see below), whose sum is σ = 28297008. Its totient is φ = 12576384.

The previous prime is 20043641. The next prime is 20043691. The reversal of 20043663 is 36634002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20043663 - 2⁶ = 20043599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196456 + ... + 196557.

It is an arithmetic number, because the mean of its divisors is an integer number (3537126).

Almost surely, 2^20043663 is an apocalyptic number.

20043663 is a deficient number, since it is larger than the sum of its proper divisors (8253345).

20043663 is a wasteful number, since it uses less digits than its factorization.

20043663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393033.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 20043663 is about 4477.0149653536. The cubic root of 20043663 is about 271.6391507797.

Adding to 20043663 its reverse (36634002), we get a palindrome (56677665).

It can be divided in two parts, 20043 and 663, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20043663 in words is "twenty million, forty-three thousand, six hundred sixty-three".