21276834 has 8 divisors (see below), whose sum is σ = 42553680. Its totient is φ = 7092276.

The previous prime is 21276823. The next prime is 21276839. The reversal of 21276834 is 43867212.

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

21276834 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21276795 and 21276804.

It is not an unprimeable number, because it can be changed into a prime (21276839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1773064 + ... + 1773075.

It is an arithmetic number, because the mean of its divisors is an integer number (5319210).

Almost surely, 2^21276834 is an apocalyptic number.

21276834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21276834 is a wasteful number, since it uses less digits than its factorization.

21276834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546144.

The product of its digits is 16128, while the sum is 33.

The square root of 21276834 is about 4612.6818663333. The cubic root of 21276834 is about 277.0994529651.

The spelling of 21276834 in words is "twenty-one million, two hundred seventy-six thousand, eight hundred thirty-four".