21794659 has 8 divisors (see below), whose sum is σ = 22374000. Its totient is φ = 21222432.

The previous prime is 21794627. The next prime is 21794671. The reversal of 21794659 is 95649712.

It is a happy number.

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 21794659 - 2⁵ = 21794627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21794609) 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, 4737 + ... + 8125.

It is an arithmetic number, because the mean of its divisors is an integer number (2796750).

Almost surely, 2^21794659 is an apocalyptic number.

21794659 is a deficient number, since it is larger than the sum of its proper divisors (579341).

21794659 is a wasteful number, since it uses less digits than its factorization.

21794659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557.

The product of its digits is 136080, while the sum is 43.

The square root of 21794659 is about 4668.4750186758. The cubic root of 21794659 is about 279.3294284948.

The spelling of 21794659 in words is "twenty-one million, seven hundred ninety-four thousand, six hundred fifty-nine".