20301689 has 8 divisors (see below), whose sum is σ = 21627648. Its totient is φ = 18990400.

The previous prime is 20301647. The next prime is 20301691. The reversal of 20301689 is 98610302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20301689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20301889) 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, 737 + ... + 6414.

It is an arithmetic number, because the mean of its divisors is an integer number (2703456).

Almost surely, 2^20301689 is an apocalyptic number.

It is an amenable number.

20301689 is a deficient number, since it is larger than the sum of its proper divisors (1325959).

20301689 is a wasteful number, since it uses less digits than its factorization.

20301689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20301689 is about 4505.7395619365. The cubic root of 20301689 is about 272.7998058223.

The spelling of 20301689 in words is "twenty million, three hundred one thousand, six hundred eighty-nine".