20881920346559 has 8 divisors (see below), whose sum is σ = 21032669911680. Its totient is φ = 20731178209176.

The previous prime is 20881920346519. The next prime is 20881920346579. The reversal of 20881920346559 is 95564302918802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20881920346559 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 (20881920346519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3849104 + ... + 7521930.

It is an arithmetic number, because the mean of its divisors is an integer number (2629083738960).

Almost surely, 2^{20881920346559} is an apocalyptic number.

20881920346559 is a deficient number, since it is larger than the sum of its proper divisors (150749565121).

20881920346559 is a wasteful number, since it uses less digits than its factorization.

20881920346559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713869.

The product of its (nonzero) digits is 37324800, while the sum is 62.

The spelling of 20881920346559 in words is "twenty trillion, eight hundred eighty-one billion, nine hundred twenty million, three hundred forty-six thousand, five hundred fifty-nine".