20010113 has 4 divisors (see below), whose sum is σ = 20019540. Its totient is φ = 20000688.

The previous prime is 20010079. The next prime is 20010127. The reversal of 20010113 is 31101002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6927424 + 13082689 = 2632^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010113 - 2¹⁸ = 19747969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20010113.

It is not an unprimeable number, because it can be changed into a prime (20010313) 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, 131 + ... + 6327.

It is an arithmetic number, because the mean of its divisors is an integer number (5004885).

Almost surely, 2^20010113 is an apocalyptic number.

It is an amenable number.

20010113 is a deficient number, since it is larger than the sum of its proper divisors (9427).

20010113 is an equidigital number, since it uses as much as digits as its factorization.

20010113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 20010113 is about 4473.2664798780. The cubic root of 20010113 is about 271.4875054592.

Adding to 20010113 its reverse (31101002), we get a palindrome (51111115).

The spelling of 20010113 in words is "twenty million, ten thousand, one hundred thirteen".