20658713 has 8 divisors (see below), whose sum is σ = 21043008. Its totient is φ = 20276784.

The previous prime is 20658707. The next prime is 20658721. The reversal of 20658713 is 31785602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20658713 - 2¹² = 20654617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20658713.

It is not an unprimeable number, because it can be changed into a prime (20658733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33395 + ... + 34007.

It is an arithmetic number, because the mean of its divisors is an integer number (2630376).

Almost surely, 2^20658713 is an apocalyptic number.

It is an amenable number.

20658713 is a deficient number, since it is larger than the sum of its proper divisors (384295).

20658713 is an equidigital number, since it uses as much as digits as its factorization.

20658713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20658713 is about 4545.1856947764. The cubic root of 20658713 is about 274.3896679252.

The spelling of 20658713 in words is "twenty million, six hundred fifty-eight thousand, seven hundred thirteen".