20360889 has 20 divisors (see below), whose sum is σ = 30612516. Its totient is φ = 13486176.

The previous prime is 20360881. The next prime is 20360891. The reversal of 20360889 is 98806302.

It can be written as a sum of positive squares in 2 ways, for example, as 19289664 + 1071225 = 4392^2 + 1035^2 .

It is not a de Polignac number, because 20360889 - 2³ = 20360881 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20360881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13287 + ... + 14739.

Almost surely, 2^20360889 is an apocalyptic number.

It is an amenable number.

20360889 is a deficient number, since it is larger than the sum of its proper divisors (10251627).

20360889 is a wasteful number, since it uses less digits than its factorization.

20360889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20360889 is about 4512.3041785766. The cubic root of 20360889 is about 273.0647111422.

The spelling of 20360889 in words is "twenty million, three hundred sixty thousand, eight hundred eighty-nine".