21946323 has 8 divisors (see below), whose sum is σ = 33442048. Its totient is φ = 12540744.

The previous prime is 21946271. The next prime is 21946333. The reversal of 21946323 is 32364912.

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

It is not a de Polignac number, because 21946323 - 2⁶ = 21946259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21946333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522511 + ... + 522552.

It is an arithmetic number, because the mean of its divisors is an integer number (4180256).

Almost surely, 2^21946323 is an apocalyptic number.

21946323 is a deficient number, since it is larger than the sum of its proper divisors (11495725).

21946323 is a wasteful number, since it uses less digits than its factorization.

21946323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045073.

The product of its digits is 7776, while the sum is 30.

The square root of 21946323 is about 4684.6902779159. The cubic root of 21946323 is about 279.9758610143.

The spelling of 21946323 in words is "twenty-one million, nine hundred forty-six thousand, three hundred twenty-three".