20131113 has 4 divisors (see below), whose sum is σ = 26841488. Its totient is φ = 13420740.

The previous prime is 20131109. The next prime is 20131117. The reversal of 20131113 is 31113102.

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 an interprime number because it is at equal distance from previous prime (20131109) and next prime (20131117).

It is not a de Polignac number, because 20131113 - 2² = 20131109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131117) 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, 3355183 + ... + 3355188.

It is an arithmetic number, because the mean of its divisors is an integer number (6710372).

Almost surely, 2^20131113 is an apocalyptic number.

It is an amenable number.

20131113 is a deficient number, since it is larger than the sum of its proper divisors (6710375).

20131113 is an equidigital number, since it uses as much as digits as its factorization.

20131113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710374.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 20131113 is about 4486.7708878435. The cubic root of 20131113 is about 272.0336292402.

Adding to 20131113 its reverse (31113102), we get a palindrome (51244215).

The spelling of 20131113 in words is "twenty million, one hundred thirty-one thousand, one hundred thirteen".