20535323439 has 4 divisors (see below), whose sum is σ = 27380431256. Its totient is φ = 13690215624.

The previous prime is 20535323407. The next prime is 20535323441. The reversal of 20535323439 is 93432353502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20535323439 - 2⁵ = 20535323407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20535323397 and 20535323406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535323839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422553904 + ... + 3422553909.

It is an arithmetic number, because the mean of its divisors is an integer number (6845107814).

Almost surely, 2^20535323439 is an apocalyptic number.

20535323439 is a deficient number, since it is larger than the sum of its proper divisors (6845107817).

20535323439 is an equidigital number, since it uses as much as digits as its factorization.

20535323439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845107816.

The product of its (nonzero) digits is 291600, while the sum is 39.

The spelling of 20535323439 in words is "twenty billion, five hundred thirty-five million, three hundred twenty-three thousand, four hundred thirty-nine".