20168663 has 8 divisors (see below), whose sum is σ = 20826432. Its totient is φ = 19516896.

The previous prime is 20168657. The next prime is 20168683. The reversal of 20168663 is 36686102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20168663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168623) 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, 5906 + ... + 8672.

It is an arithmetic number, because the mean of its divisors is an integer number (2603304).

Almost surely, 2^20168663 is an apocalyptic number.

20168663 is a deficient number, since it is larger than the sum of its proper divisors (657769).

20168663 is a wasteful number, since it uses less digits than its factorization.

20168663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20168663 is about 4490.9534622394. The cubic root of 20168663 is about 272.2026630833.

The spelling of 20168663 in words is "twenty million, one hundred sixty-eight thousand, six hundred sixty-three".