20141665 has 4 divisors (see below), whose sum is σ = 24170004. Its totient is φ = 16113328.

The previous prime is 20141663. The next prime is 20141707. The reversal of 20141665 is 56614102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56614102 = 2 ⋅28307051.

It can be written as a sum of positive squares in 2 ways, for example, as 5326864 + 14814801 = 2308^2 + 3849^2 .

It is a cyclic number.

It is not a de Polignac number, because 20141665 - 2¹ = 20141663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20141663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014162 + ... + 2014171.

It is an arithmetic number, because the mean of its divisors is an integer number (6042501).

Almost surely, 2^20141665 is an apocalyptic number.

It is an amenable number.

20141665 is a deficient number, since it is larger than the sum of its proper divisors (4028339).

20141665 is an equidigital number, since it uses as much as digits as its factorization.

20141665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028338.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20141665 is about 4487.9466351551. The cubic root of 20141665 is about 272.0811509953.

Adding to 20141665 its reverse (56614102), we get a palindrome (76755767).

The spelling of 20141665 in words is "twenty million, one hundred forty-one thousand, six hundred sixty-five".