20090863 has 8 divisors (see below), whose sum is σ = 21679056. Its totient is φ = 18508800.

The previous prime is 20090849. The next prime is 20090867. The reversal of 20090863 is 36809002.

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 20090863 - 2⁹ = 20090351 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 (20090867) 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, 7128 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (2709882).

Almost surely, 2^20090863 is an apocalyptic number.

20090863 is a deficient number, since it is larger than the sum of its proper divisors (1588193).

20090863 is a wasteful number, since it uses less digits than its factorization.

20090863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20090863 is about 4482.2832351381. The cubic root of 20090863 is about 271.8522075929.

Adding to 20090863 its reverse (36809002), we get a palindrome (56899865).

The spelling of 20090863 in words is "twenty million, ninety thousand, eight hundred sixty-three".