21230834 has 8 divisors (see below), whose sum is σ = 31881600. Its totient is φ = 10603636.

The previous prime is 21230827. The next prime is 21230843. The reversal of 21230834 is 43803212.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3434 + ... + 7365.

It is an arithmetic number, because the mean of its divisors is an integer number (3985200).

Almost surely, 2^21230834 is an apocalyptic number.

21230834 is a deficient number, since it is larger than the sum of its proper divisors (10650766).

21230834 is a wasteful number, since it uses less digits than its factorization.

21230834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21230834 is about 4607.6929151149. The cubic root of 21230834 is about 276.8996147778.

The spelling of 21230834 in words is "twenty-one million, two hundred thirty thousand, eight hundred thirty-four".