20000317481 has 2 divisors, whose sum is σ = 20000317482. Its totient is φ = 20000317480.

The previous prime is 20000317457. The next prime is 20000317487. The reversal of 20000317481 is 18471300002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17395235881 + 2605081600 = 131891^2 + 51040^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000317481 - 2¹⁸ = 20000055337 is a prime.

It is a super-2 number, since 2×20000317481² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20000317481.

It is not a weakly prime, because it can be changed into another prime (20000317487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000158740 + 10000158741.

It is an arithmetic number, because the mean of its divisors is an integer number (10000158741).

Almost surely, 2^20000317481 is an apocalyptic number.

It is an amenable number.

20000317481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000317481 is an equidigital number, since it uses as much as digits as its factorization.

20000317481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 20000317481 its reverse (18471300002), we get a palindrome (38471617483).

The spelling of 20000317481 in words is "twenty billion, three hundred seventeen thousand, four hundred eighty-one".