20020863 has 8 divisors (see below), whose sum is σ = 26794800. Its totient is φ = 13297088.

The previous prime is 20020841. The next prime is 20020901. The reversal of 20020863 is 36802002.

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

It is a cyclic number.

It is not a de Polignac number, because 20020863 - 2⁶ = 20020799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11598 + ... + 13211.

It is an arithmetic number, because the mean of its divisors is an integer number (3349350).

Almost surely, 2^20020863 is an apocalyptic number.

20020863 is a deficient number, since it is larger than the sum of its proper divisors (6773937).

20020863 is a wasteful number, since it uses less digits than its factorization.

20020863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25081.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20020863 is about 4474.4679013264. The cubic root of 20020863 is about 271.5361136839.

Adding to 20020863 its reverse (36802002), we get a palindrome (56822865).

The spelling of 20020863 in words is "twenty million, twenty thousand, eight hundred sixty-three".