20502535519 has 2 divisors, whose sum is σ = 20502535520. Its totient is φ = 20502535518.

The previous prime is 20502535511. The next prime is 20502535591. The reversal of 20502535519 is 91553520502.

Together with next prime (20502535591) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20502535519 - 2³ = 20502535511 is a prime.

It is a super-2 number, since 2×20502535519² (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 (20502535511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251267759 + 10251267760.

It is an arithmetic number, because the mean of its divisors is an integer number (10251267760).

Almost surely, 2^20502535519 is an apocalyptic number.

20502535519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502535519 is an equidigital number, since it uses as much as digits as its factorization.

20502535519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 20502535519 in words is "twenty billion, five hundred two million, five hundred thirty-five thousand, five hundred nineteen".