20088689 has 4 divisors (see below), whose sum is σ = 20106240. Its totient is φ = 20071140.

The previous prime is 20088671. The next prime is 20088707. The reversal of 20088689 is 98688002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20088671) and next prime (20088707).

It is a cyclic number.

It is not a de Polignac number, because 20088689 - 2⁸ = 20088433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20088659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6929 + ... + 9390.

It is an arithmetic number, because the mean of its divisors is an integer number (5026560).

Almost surely, 2^20088689 is an apocalyptic number.

It is an amenable number.

20088689 is a deficient number, since it is larger than the sum of its proper divisors (17551).

20088689 is a wasteful number, since it uses less digits than its factorization.

20088689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17550.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 20088689 is about 4482.0407182443. The cubic root of 20088689 is about 271.8424016757.

The spelling of 20088689 in words is "twenty million, eighty-eight thousand, six hundred eighty-nine".