20011113 has 6 divisors (see below), whose sum is σ = 28904954. Its totient is φ = 13340736.

The previous prime is 20011099. The next prime is 20011139. The reversal of 20011113 is 31111002.

It can be written as a sum of positive squares in only one way, i.e., 17614809 + 2396304 = 4197^2 + 1548^2 .

It is not a de Polignac number, because 20011113 - 2⁴ = 20011097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2223457 = 20011113 / (2 + 0 + 0 + 1 + 1 + 1 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011095 and 20011104.

It is not an unprimeable number, because it can be changed into a prime (20011153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111720 + ... + 1111737.

Almost surely, 2^20011113 is an apocalyptic number.

It is an amenable number.

20011113 is a deficient number, since it is larger than the sum of its proper divisors (8893841).

20011113 is a wasteful number, since it uses less digits than its factorization.

20011113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223463 (or 2223460 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 20011113 is about 4473.3782536244. The cubic root of 20011113 is about 271.4920278888.

Adding to 20011113 its reverse (31111002), we get a palindrome (51122115).

The spelling of 20011113 in words is "twenty million, eleven thousand, one hundred thirteen".