20206713 has 4 divisors (see below), whose sum is σ = 26942288. Its totient is φ = 13471140.

The previous prime is 20206691. The next prime is 20206721. The reversal of 20206713 is 31760202.

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 20206713 - 2¹⁸ = 19944569 is a prime.

It is a super-2 number, since 2×20206713² = 816622500528738, which contains 22 as substring.

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 20206713.

It is not an unprimeable number, because it can be changed into a prime (20206763) 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, 3367783 + ... + 3367788.

It is an arithmetic number, because the mean of its divisors is an integer number (6735572).

Almost surely, 2^20206713 is an apocalyptic number.

It is an amenable number.

20206713 is a deficient number, since it is larger than the sum of its proper divisors (6735575).

20206713 is an equidigital number, since it uses as much as digits as its factorization.

20206713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735574.

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

The square root of 20206713 is about 4495.1877602610. The cubic root of 20206713 is about 272.3737338316.

Adding to 20206713 its reverse (31760202), we get a palindrome (51966915).

The spelling of 20206713 in words is "twenty million, two hundred six thousand, seven hundred thirteen".