20633915017 has 2 divisors, whose sum is σ = 20633915018. Its totient is φ = 20633915016.

The previous prime is 20633914967. The next prime is 20633915021. The reversal of 20633915017 is 71051933602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18456852736 + 2177062281 = 135856^2 + 46659^2 .

It is a cyclic number.

It is not a de Polignac number, because 20633915017 - 2¹¹ = 20633912969 is a prime.

It is a super-2 number, since 2×20633915017² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20633919017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316957508 + 10316957509.

It is an arithmetic number, because the mean of its divisors is an integer number (10316957509).

Almost surely, 2^20633915017 is an apocalyptic number.

It is an amenable number.

20633915017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20633915017 is an equidigital number, since it uses as much as digits as its factorization.

20633915017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The spelling of 20633915017 in words is "twenty billion, six hundred thirty-three million, nine hundred fifteen thousand, seventeen".