20113689 has 8 divisors (see below), whose sum is σ = 26876160. Its totient is φ = 13380176.

The previous prime is 20113673. The next prime is 20113721. The reversal of 20113689 is 98631102.

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 20113689 - 2⁴ = 20113673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20113649) 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, 5562 + ... + 8435.

It is an arithmetic number, because the mean of its divisors is an integer number (3359520).

Almost surely, 2^20113689 is an apocalyptic number.

It is an amenable number.

20113689 is a deficient number, since it is larger than the sum of its proper divisors (6762471).

20113689 is a wasteful number, since it uses less digits than its factorization.

20113689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14479.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20113689 is about 4484.8287592728. The cubic root of 20113689 is about 271.9551225340.

It can be divided in two parts, 20113 and 689, that added together give a palindrome (20802).

The spelling of 20113689 in words is "twenty million, one hundred thirteen thousand, six hundred eighty-nine".