20713713 has 4 divisors (see below), whose sum is σ = 27618288. Its totient is φ = 13809140.

The previous prime is 20713703. The next prime is 20713741. The reversal of 20713713 is 31731702.

20713713 is nontrivially palindromic in base 4.

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 20713713 - 2⁴ = 20713697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20713703) 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 3 ways as a sum of consecutive naturals, for example, 3452283 + ... + 3452288.

It is an arithmetic number, because the mean of its divisors is an integer number (6904572).

Almost surely, 2^20713713 is an apocalyptic number.

It is an amenable number.

20713713 is a deficient number, since it is larger than the sum of its proper divisors (6904575).

20713713 is an equidigital number, since it uses as much as digits as its factorization.

20713713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904574.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 20713713 is about 4551.2320310000. The cubic root of 20713713 is about 274.6329560525.

The spelling of 20713713 in words is "twenty million, seven hundred thirteen thousand, seven hundred thirteen".