20684505029 has 8 divisors (see below), whose sum is σ = 21048037920. Its totient is φ = 20321403856.

The previous prime is 20684505019. The next prime is 20684505031. The reversal of 20684505029 is 92050548602.

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-20684505029 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 (20684505019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10499 + ... + 203664.

It is an arithmetic number, because the mean of its divisors is an integer number (2631004740).

Almost surely, 2^20684505029 is an apocalyptic number.

It is an amenable number.

20684505029 is a deficient number, since it is larger than the sum of its proper divisors (363532891).

20684505029 is a wasteful number, since it uses less digits than its factorization.

20684505029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215859.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 20684505029 in words is "twenty billion, six hundred eighty-four million, five hundred five thousand, twenty-nine".