20200113 has 12 divisors (see below), whose sum is σ = 29967028. Its totient is φ = 13102560.

The previous prime is 20200111. The next prime is 20200121. The reversal of 20200113 is 31100202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10909809 + 9290304 = 3303^2 + 3048^2 .

It is not a de Polignac number, because 20200113 - 2¹ = 20200111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200095 and 20200104.

It is not an unprimeable number, because it can be changed into a prime (20200111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29998 + ... + 30663.

Almost surely, 2^20200113 is an apocalyptic number.

It is an amenable number.

20200113 is a deficient number, since it is larger than the sum of its proper divisors (9766915).

20200113 is a wasteful number, since it uses less digits than its factorization.

20200113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60704 (or 60701 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20200113 is about 4494.4535819163. The cubic root of 20200113 is about 272.3440759913.

Adding to 20200113 its reverse (31100202), we get a palindrome (51300315).

The spelling of 20200113 in words is "twenty million, two hundred thousand, one hundred thirteen".