20007889 has 8 divisors (see below), whose sum is σ = 21880800. Its totient is φ = 18144000.

The previous prime is 20007881. The next prime is 20007919. The reversal of 20007889 is 98870002.

It is a happy number.

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 20007889 - 2³ = 20007881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20007881) 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, 2914 + ... + 6964.

It is an arithmetic number, because the mean of its divisors is an integer number (2735100).

Almost surely, 2^20007889 is an apocalyptic number.

It is an amenable number.

20007889 is a deficient number, since it is larger than the sum of its proper divisors (1872911).

20007889 is a wasteful number, since it uses less digits than its factorization.

20007889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 20007889 is about 4473.0178850526. The cubic root of 20007889 is about 271.4774470355.

It can be divided in two parts, 2000 and 7889, that added together give a palindrome (9889).

The spelling of 20007889 in words is "twenty million, seven thousand, eight hundred eighty-nine".