20688684233 has 8 divisors (see below), whose sum is σ = 23648032320. Its totient is φ = 17730291600.

The previous prime is 20688684221. The next prime is 20688684319. The reversal of 20688684233 is 33248688602.

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

It is not a de Polignac number, because 20688684233 - 2⁶ = 20688684169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20688684833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191843 + ... + 279608.

It is an arithmetic number, because the mean of its divisors is an integer number (2956004040).

Almost surely, 2^20688684233 is an apocalyptic number.

It is an amenable number.

20688684233 is a deficient number, since it is larger than the sum of its proper divisors (2959348087).

20688684233 is an equidigital number, since it uses as much as digits as its factorization.

20688684233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477727.

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 20688684233 in words is "twenty billion, six hundred eighty-eight million, six hundred eighty-four thousand, two hundred thirty-three".