21829825705 has 8 divisors (see below), whose sum is σ = 27574516800. Its totient is φ = 16544709936.

The previous prime is 21829825697. The next prime is 21829825723. The reversal of 21829825705 is 50752892812.

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

It is a cyclic number.

It is not a de Polignac number, because 21829825705 - 2³ = 21829825697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114893725 + ... + 114893914.

It is an arithmetic number, because the mean of its divisors is an integer number (3446814600).

Almost surely, 2^21829825705 is an apocalyptic number.

It is an amenable number.

21829825705 is a deficient number, since it is larger than the sum of its proper divisors (5744691095).

21829825705 is a wasteful number, since it uses less digits than its factorization.

21829825705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229787663.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 21829825705 in words is "twenty-one billion, eight hundred twenty-nine million, eight hundred twenty-five thousand, seven hundred five".