20100089 has 4 divisors (see below), whose sum is σ = 20212560. Its totient is φ = 19987620.

The previous prime is 20100083. The next prime is 20100097. The reversal of 20100089 is 98000102.

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 a cyclic number.

It is not a de Polignac number, because 20100089 - 2²⁴ = 3322873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20100089.

It is not an unprimeable number, because it can be changed into a prime (20100083) 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, 55967 + ... + 56324.

It is an arithmetic number, because the mean of its divisors is an integer number (5053140).

Almost surely, 2^20100089 is an apocalyptic number.

It is an amenable number.

20100089 is a deficient number, since it is larger than the sum of its proper divisors (112471).

20100089 is a wasteful number, since it uses less digits than its factorization.

20100089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112470.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 20100089 is about 4483.3122800001. The cubic root of 20100089 is about 271.8938139797.

The spelling of 20100089 in words is "twenty million, one hundred thousand, eighty-nine".