20006263 has 8 divisors (see below), whose sum is σ = 21222432. Its totient is φ = 18794496.

The previous prime is 20006243. The next prime is 20006279. The reversal of 20006263 is 36260002.

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-20006263 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 20006263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006243) 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 7 ways as a sum of consecutive naturals, for example, 15831 + ... + 17047.

It is an arithmetic number, because the mean of its divisors is an integer number (2652804).

Almost surely, 2^20006263 is an apocalyptic number.

20006263 is a deficient number, since it is larger than the sum of its proper divisors (1216169).

20006263 is a wasteful number, since it uses less digits than its factorization.

20006263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20006263 is about 4472.8361248765. The cubic root of 20006263 is about 271.4700926983.

Adding to 20006263 its reverse (36260002), we get a palindrome (56266265).

The spelling of 20006263 in words is "twenty million, six thousand, two hundred sixty-three".