20535321594839 has 4 divisors (see below), whose sum is σ = 20535457841280. Its totient is φ = 20535185348400.

The previous prime is 20535321594761. The next prime is 20535321594847. The reversal of 20535321594839 is 93849512353502.

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

It is a cyclic number.

It is not a de Polignac number, because 20535321594839 - 2¹² = 20535321590743 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 (20535321594869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67896887 + ... + 68198664.

It is an arithmetic number, because the mean of its divisors is an integer number (5133864460320).

Almost surely, 2^{20535321594839} is an apocalyptic number.

20535321594839 is a deficient number, since it is larger than the sum of its proper divisors (136246441).

20535321594839 is a wasteful number, since it uses less digits than its factorization.

20535321594839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136246440.

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 20535321594839 in words is "twenty trillion, five hundred thirty-five billion, three hundred twenty-one million, five hundred ninety-four thousand, eight hundred thirty-nine".