20190765 has 32 divisors (see below), whose sum is σ = 38117376. Its totient is φ = 8930880.

The previous prime is 20190763. The next prime is 20190811. The reversal of 20190765 is 56709102.

It is not a de Polignac number, because 20190765 - 2¹ = 20190763 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20190763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (1191168).

Almost surely, 2^20190765 is an apocalyptic number.

It is an amenable number.

20190765 is a deficient number, since it is larger than the sum of its proper divisors (17926611).

20190765 is a wasteful number, since it uses less digits than its factorization.

20190765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6249.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20190765 is about 4493.4135131323. The cubic root of 20190765 is about 272.3020586481.

Adding to 20190765 its reverse (56709102), we get a palindrome (76899867).

The spelling of 20190765 in words is "twenty million, one hundred ninety thousand, seven hundred sixty-five".