20317755347 has 4 divisors (see below), whose sum is σ = 20320072200. Its totient is φ = 20315438496.

The previous prime is 20317755329. The next prime is 20317755361. The reversal of 20317755347 is 74355771302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74355771302 = 2 ⋅37177885651.

It is a cyclic number.

It is not a de Polignac number, because 20317755347 - 2⁸ = 20317755091 is a prime.

It is a super-2 number, since 2×20317755347² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20317755298 and 20317755307.

It is not an unprimeable number, because it can be changed into a prime (20317755307) 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, 1145222 + ... + 1162827.

It is an arithmetic number, because the mean of its divisors is an integer number (5080018050).

Almost surely, 2^20317755347 is an apocalyptic number.

20317755347 is a deficient number, since it is larger than the sum of its proper divisors (2316853).

20317755347 is an equidigital number, since it uses as much as digits as its factorization.

20317755347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316852.

The product of its (nonzero) digits is 617400, while the sum is 44.

The spelling of 20317755347 in words is "twenty billion, three hundred seventeen million, seven hundred fifty-five thousand, three hundred forty-seven".