21804682379 has 8 divisors (see below), whose sum is σ = 21912914448. Its totient is φ = 21696699040.

The previous prime is 21804682331. The next prime is 21804682439. The reversal of 21804682379 is 97328640812.

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-21804682379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21804682309) 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, 114824 + ... + 238314.

It is an arithmetic number, because the mean of its divisors is an integer number (2739114306).

Almost surely, 2^21804682379 is an apocalyptic number.

21804682379 is a deficient number, since it is larger than the sum of its proper divisors (108232069).

21804682379 is a wasteful number, since it uses less digits than its factorization.

21804682379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124365.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 21804682379 in words is "twenty-one billion, eight hundred four million, six hundred eighty-two thousand, three hundred seventy-nine".