21046326 has 16 divisors (see below), whose sum is σ = 48105984. Its totient is φ = 6013224.

The previous prime is 21046309. The next prime is 21046327. The reversal of 21046326 is 62364012.

It is a junction number, because it is equal to n+sod(n) for n = 21046296 and 21046305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046327) 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, 250510 + ... + 250593.

It is an arithmetic number, because the mean of its divisors is an integer number (3006624).

Almost surely, 2^21046326 is an apocalyptic number.

21046326 is an abundant number, since it is smaller than the sum of its proper divisors (27059658).

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

21046326 is a wasteful number, since it uses less digits than its factorization.

21046326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501115.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 21046326 is about 4587.6274914165. The cubic root of 21046326 is about 276.0951415326.

The spelling of 21046326 in words is "twenty-one million, forty-six thousand, three hundred twenty-six".