20519743293 has 48 divisors (see below), whose sum is σ = 35024084992. Its totient is φ = 11328660000.

The previous prime is 20519743271. The next prime is 20519743303. The reversal of 20519743293 is 39234791502.

20519743293 is a `hidden beast` number, since 2 + 0 + 519 + 7 + 43 + 2 + 93 = 666.

It is not a de Polignac number, because 20519743293 - 2¹⁸ = 20519481149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519743243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1224018 + ... + 1240668.

Almost surely, 2^20519743293 is an apocalyptic number.

It is an amenable number.

20519743293 is a deficient number, since it is larger than the sum of its proper divisors (14504341699).

20519743293 is a wasteful number, since it uses less digits than its factorization.

20519743293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17326 (or 17323 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 20519743293 in words is "twenty billion, five hundred nineteen million, seven hundred forty-three thousand, two hundred ninety-three".