20943502519 has 2 divisors, whose sum is σ = 20943502520. Its totient is φ = 20943502518.

The previous prime is 20943502507. The next prime is 20943502523. The reversal of 20943502519 is 91520534902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20943502519 - 2⁹ = 20943502007 is a prime.

It is a super-2 number, since 2×20943502519² (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 (20943502549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10471751259 + 10471751260.

It is an arithmetic number, because the mean of its divisors is an integer number (10471751260).

Almost surely, 2^20943502519 is an apocalyptic number.

20943502519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20943502519 is an equidigital number, since it uses as much as digits as its factorization.

20943502519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 20943502519 in words is "twenty billion, nine hundred forty-three million, five hundred two thousand, five hundred nineteen".