20013113 has 4 divisors (see below), whose sum is σ = 20133120. Its totient is φ = 19893108.

The previous prime is 20013109. The next prime is 20013121. The reversal of 20013113 is 31131002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20013113 - 2² = 20013109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20013094 and 20013103.

It is not an unprimeable number, because it can be changed into a prime (20013193) 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, 59753 + ... + 60086.

It is an arithmetic number, because the mean of its divisors is an integer number (5033280).

Almost surely, 2^20013113 is an apocalyptic number.

It is an amenable number.

20013113 is a deficient number, since it is larger than the sum of its proper divisors (120007).

20013113 is a wasteful number, since it uses less digits than its factorization.

20013113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120006.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20013113 is about 4473.6017927393. The cubic root of 20013113 is about 271.5010722960.

Adding to 20013113 its reverse (31131002), we get a palindrome (51144115).

The spelling of 20013113 in words is "twenty million, thirteen thousand, one hundred thirteen".