20917000529 has 2 divisors, whose sum is σ = 20917000530. Its totient is φ = 20917000528.

The previous prime is 20917000519. The next prime is 20917000553. The reversal of 20917000529 is 92500071902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17951980225 + 2965020304 = 133985^2 + 54452^2 .

It is a cyclic number.

It is not a de Polignac number, because 20917000529 - 2¹² = 20916996433 is a prime.

It is a super-2 number, since 2×20917000529² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20917000519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10458500264 + 10458500265.

It is an arithmetic number, because the mean of its divisors is an integer number (10458500265).

Almost surely, 2^20917000529 is an apocalyptic number.

It is an amenable number.

20917000529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20917000529 is an equidigital number, since it uses as much as digits as its factorization.

20917000529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The spelling of 20917000529 in words is "twenty billion, nine hundred seventeen million, five hundred twenty-nine", and thus it is an aban number.