20917000519 has 2 divisors, whose sum is σ = 20917000520. Its totient is φ = 20917000518.

The previous prime is 20917000477. The next prime is 20917000529. The reversal of 20917000519 is 91500071902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20917000519 - 2⁹ = 20917000007 is a prime.

It is a super-2 number, since 2×20917000519² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20917000529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10458500259 + 10458500260.

It is an arithmetic number, because the mean of its divisors is an integer number (10458500260).

Almost surely, 2^20917000519 is an apocalyptic number.

20917000519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20917000519 is an equidigital number, since it uses as much as digits as its factorization.

20917000519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 34.

The spelling of 20917000519 in words is "twenty billion, nine hundred seventeen million, five hundred nineteen", and thus it is an aban number.