20717141813 has 4 divisors (see below), whose sum is σ = 20764333920. Its totient is φ = 20669949708.

The previous prime is 20717141761. The next prime is 20717141821. The reversal of 20717141813 is 31814171702.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31814171702 = 2 ⋅15907085851.

It is a cyclic number.

It is not a de Polignac number, because 20717141813 - 2¹⁶ = 20717076277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20717141833) 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, 23595395 + ... + 23596272.

It is an arithmetic number, because the mean of its divisors is an integer number (5191083480).

Almost surely, 2^20717141813 is an apocalyptic number.

It is an amenable number.

20717141813 is a deficient number, since it is larger than the sum of its proper divisors (47192107).

20717141813 is an equidigital number, since it uses as much as digits as its factorization.

20717141813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47192106.

The product of its (nonzero) digits is 9408, while the sum is 35.

The spelling of 20717141813 in words is "twenty billion, seven hundred seventeen million, one hundred forty-one thousand, eight hundred thirteen".