20765189 has 8 divisors (see below), whose sum is σ = 21742560. Its totient is φ = 19805296.

The previous prime is 20765183. The next prime is 20765201. The reversal of 20765189 is 98156702.

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 20765189 - 2¹² = 20761093 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 (20765183) 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, 1907 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (2717820).

Almost surely, 2^20765189 is an apocalyptic number.

20765189 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20765189 is a deficient number, since it is larger than the sum of its proper divisors (977371).

20765189 is an equidigital number, since it uses as much as digits as its factorization.

20765189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8739.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 20765189 is about 4556.8836939294. The cubic root of 20765189 is about 274.8602662002.

The spelling of 20765189 in words is "twenty million, seven hundred sixty-five thousand, one hundred eighty-nine".