20113361 has 4 divisors (see below), whose sum is σ = 20248500. Its totient is φ = 19978224.

The previous prime is 20113337. The next prime is 20113367. The reversal of 20113361 is 16331102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11262736 + 8850625 = 3356^2 + 2975^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113361 - 2¹⁴ = 20096977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113367) 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, 67346 + ... + 67643.

It is an arithmetic number, because the mean of its divisors is an integer number (5062125).

Almost surely, 2^20113361 is an apocalyptic number.

It is an amenable number.

20113361 is a deficient number, since it is larger than the sum of its proper divisors (135139).

20113361 is a wasteful number, since it uses less digits than its factorization.

20113361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135138.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20113361 is about 4484.7921913953. The cubic root of 20113361 is about 271.9536442412.

Adding to 20113361 its reverse (16331102), we get a palindrome (36444463).

The spelling of 20113361 in words is "twenty million, one hundred thirteen thousand, three hundred sixty-one".