20101365 has 20 divisors (see below), whose sum is σ = 36034284. Its totient is φ = 10720512.

The previous prime is 20101351. The next prime is 20101369. The reversal of 20101365 is 56310102.

It can be written as a sum of positive squares in 2 ways, for example, as 5948721 + 14152644 = 2439^2 + 3762^2 .

It is not a de Polignac number, because 20101365 - 2⁴ = 20101349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101369) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24412 + ... + 25221.

Almost surely, 2^20101365 is an apocalyptic number.

It is an amenable number.

20101365 is a deficient number, since it is larger than the sum of its proper divisors (15932919).

20101365 is an equidigital number, since it uses as much as digits as its factorization.

20101365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49650 (or 49641 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20101365 is about 4483.4545832427. The cubic root of 20101365 is about 271.8995673400.

Adding to 20101365 its reverse (56310102), we get a palindrome (76411467).

It can be divided in two parts, 2010 and 1365, that added together give a cube (3375 = 15³).

The spelling of 20101365 in words is "twenty million, one hundred one thousand, three hundred sixty-five".