20620713 has 4 divisors (see below), whose sum is σ = 27494288. Its totient is φ = 13747140.

The previous prime is 20620709. The next prime is 20620751. The reversal of 20620713 is 31702602.

It is a happy number.

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 not a de Polignac number, because 20620713 - 2² = 20620709 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 20620713.

It is not an unprimeable number, because it can be changed into a prime (20620783) 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 3 ways as a sum of consecutive naturals, for example, 3436783 + ... + 3436788.

It is an arithmetic number, because the mean of its divisors is an integer number (6873572).

Almost surely, 2^20620713 is an apocalyptic number.

It is an amenable number.

20620713 is a deficient number, since it is larger than the sum of its proper divisors (6873575).

20620713 is an equidigital number, since it uses as much as digits as its factorization.

20620713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6873574.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20620713 is about 4541.0035234516. The cubic root of 20620713 is about 274.2213256055.

The spelling of 20620713 in words is "twenty million, six hundred twenty thousand, seven hundred thirteen".