20329403661839 has 8 divisors (see below), whose sum is σ = 21399542081280. Its totient is φ = 19259282223000.

The previous prime is 20329403661811. The next prime is 20329403661943. The reversal of 20329403661839 is 93816630492302.

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-20329403661839 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 (20329403661439) 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, 1750097 + ... + 6612234.

It is an arithmetic number, because the mean of its divisors is an integer number (2674942760160).

Almost surely, 2^{20329403661839} is an apocalyptic number.

20329403661839 is a deficient number, since it is larger than the sum of its proper divisors (1070138419441).

20329403661839 is a wasteful number, since it uses less digits than its factorization.

20329403661839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8490301.

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 20329403661839 in words is "twenty trillion, three hundred twenty-nine billion, four hundred three million, six hundred sixty-one thousand, eight hundred thirty-nine".