20365189 has 8 divisors (see below), whose sum is σ = 22885632. Its totient is φ = 17981040.

The previous prime is 20365157. The next prime is 20365193. The reversal of 20365189 is 98156302.

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 20365189 - 2⁵ = 20365157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365139) 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, 33757 + ... + 34354.

It is an arithmetic number, because the mean of its divisors is an integer number (2860704).

Almost surely, 2^20365189 is an apocalyptic number.

It is an amenable number.

20365189 is a deficient number, since it is larger than the sum of its proper divisors (2520443).

20365189 is a wasteful number, since it uses less digits than its factorization.

20365189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68147.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 20365189 is about 4512.7806283931. The cubic root of 20365189 is about 273.0839325624.

It can be divided in two parts, 2036 and 5189, that added together give a square (7225 = 85²).

The spelling of 20365189 in words is "twenty million, three hundred sixty-five thousand, one hundred eighty-nine".