20768859 has 16 divisors (see below), whose sum is σ = 30846240. Its totient is φ = 13811040.

The previous prime is 20768851. The next prime is 20768873. The reversal of 20768859 is 95886702.

It is not a de Polignac number, because 20768859 - 2³ = 20768851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14349 + ... + 15729.

It is an arithmetic number, because the mean of its divisors is an integer number (1927890).

Almost surely, 2^20768859 is an apocalyptic number.

20768859 is a deficient number, since it is larger than the sum of its proper divisors (10077381).

20768859 is a wasteful number, since it uses less digits than its factorization.

20768859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 20768859 is about 4557.2863636160. The cubic root of 20768859 is about 274.8764580065.

The spelling of 20768859 in words is "twenty million, seven hundred sixty-eight thousand, eight hundred fifty-nine".