20341765 has 4 divisors (see below), whose sum is σ = 24410124. Its totient is φ = 16273408.

The previous prime is 20341759. The next prime is 20341777. The reversal of 20341765 is 56714302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56714302 = 2 ⋅28357151.

It can be written as a sum of positive squares in 2 ways, for example, as 16208676 + 4133089 = 4026^2 + 2033^2 .

It is a cyclic number.

It is not a de Polignac number, because 20341765 - 2¹¹ = 20339717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2034172 + ... + 2034181.

It is an arithmetic number, because the mean of its divisors is an integer number (6102531).

Almost surely, 2^20341765 is an apocalyptic number.

It is an amenable number.

20341765 is a deficient number, since it is larger than the sum of its proper divisors (4068359).

20341765 is an equidigital number, since it uses as much as digits as its factorization.

20341765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068358.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20341765 is about 4510.1845860231. The cubic root of 20341765 is about 272.9791921955.

The spelling of 20341765 in words is "twenty million, three hundred forty-one thousand, seven hundred sixty-five".