20007163 has 4 divisors (see below), whose sum is σ = 21826008. Its totient is φ = 18188320.

The previous prime is 20007157. The next prime is 20007167. The reversal of 20007163 is 36170002.

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-20007163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20007163.

It is not an unprimeable number, because it can be changed into a prime (20007167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909406 + ... + 909427.

It is an arithmetic number, because the mean of its divisors is an integer number (5456502).

Almost surely, 2^20007163 is an apocalyptic number.

20007163 is a deficient number, since it is larger than the sum of its proper divisors (1818845).

20007163 is a wasteful number, since it uses less digits than its factorization.

20007163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818844.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20007163 is about 4472.9367310527. The cubic root of 20007163 is about 271.4741634139.

Adding to 20007163 its reverse (36170002), we get a palindrome (56177165).

The spelling of 20007163 in words is "twenty million, seven thousand, one hundred sixty-three".