20329403661841 has 8 divisors (see below), whose sum is σ = 20715061443624. Its totient is φ = 19943823070080.

The previous prime is 20329403661811. The next prime is 20329403661943. The reversal of 20329403661841 is 14816630492302.

It can be written as a sum of positive squares in 4 ways, for example, as 697450468225 + 19631953193616 = 835135^2 + 4430796^2 .

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-20329403661841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20329403661811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18765636 + ... + 19819381.

It is an arithmetic number, because the mean of its divisors is an integer number (2589382680453).

Almost surely, 2^{20329403661841} is an apocalyptic number.

It is an amenable number.

20329403661841 is a deficient number, since it is larger than the sum of its proper divisors (385657781783).

20329403661841 is an equidigital number, since it uses as much as digits as its factorization.

20329403661841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38595011.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 20329403661841 in words is "twenty trillion, three hundred twenty-nine billion, four hundred three million, six hundred sixty-one thousand, eight hundred forty-one".