20113713 has 12 divisors (see below), whose sum is σ = 29530228. Its totient is φ = 13188960.

The previous prime is 20113673. The next prime is 20113721. The reversal of 20113713 is 31731102.

It can be written as a sum of positive squares in 2 ways, for example, as 3196944 + 16916769 = 1788^2 + 4113^2 .

It is not a de Polignac number, because 20113713 - 2⁶ = 20113649 is a prime.

It is a super-2 number, since 2×20113713² = 809122901292738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113783) 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, 17770 + ... + 18867.

Almost surely, 2^20113713 is an apocalyptic number.

It is an amenable number.

20113713 is a deficient number, since it is larger than the sum of its proper divisors (9416515).

20113713 is a wasteful number, since it uses less digits than its factorization.

20113713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36704 (or 36701 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 20113713 is about 4484.8314349594. The cubic root of 20113713 is about 271.9552307012.

Adding to 20113713 its reverse (31731102), we get a palindrome (51844815).

The spelling of 20113713 in words is "twenty million, one hundred thirteen thousand, seven hundred thirteen".