20317755371 has 2 divisors, whose sum is σ = 20317755372. Its totient is φ = 20317755370.

The previous prime is 20317755361. The next prime is 20317755373. The reversal of 20317755371 is 17355771302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20317755371 - 2⁶ = 20317755307 is a prime.

It is a super-2 number, since 2×20317755371² (a number of 21 digits) contains 22 as substring.

Together with 20317755373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20317755373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158877685 + 10158877686.

It is an arithmetic number, because the mean of its divisors is an integer number (10158877686).

Almost surely, 2^20317755371 is an apocalyptic number.

20317755371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317755371 is an equidigital number, since it uses as much as digits as its factorization.

20317755371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154350, while the sum is 41.

The spelling of 20317755371 in words is "twenty billion, three hundred seventeen million, seven hundred fifty-five thousand, three hundred seventy-one".