20393713 has 4 divisors (see below), whose sum is σ = 20450880. Its totient is φ = 20336548.

The previous prime is 20393689. The next prime is 20393717. The reversal of 20393713 is 31739302.

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 a de Polignac number, because none of the positive numbers 2^k-20393713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20393717) 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, 28045 + ... + 28762.

It is an arithmetic number, because the mean of its divisors is an integer number (5112720).

Almost surely, 2^20393713 is an apocalyptic number.

It is an amenable number.

20393713 is a deficient number, since it is larger than the sum of its proper divisors (57167).

20393713 is an equidigital number, since it uses as much as digits as its factorization.

20393713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57166.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 20393713 is about 4515.9398800250. The cubic root of 20393713 is about 273.2113691769.

The spelling of 20393713 in words is "twenty million, three hundred ninety-three thousand, seven hundred thirteen".