21322846 has 4 divisors (see below), whose sum is σ = 31984272. Its totient is φ = 10661422.

The previous prime is 21322799. The next prime is 21322849. The reversal of 21322846 is 64822312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322849) 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 as a sum of consecutive naturals, namely, 5330710 + ... + 5330713.

It is an arithmetic number, because the mean of its divisors is an integer number (7996068).

Almost surely, 2^21322846 is an apocalyptic number.

21322846 is a deficient number, since it is larger than the sum of its proper divisors (10661426).

21322846 is a wasteful number, since it uses less digits than its factorization.

21322846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661425.

The product of its digits is 4608, while the sum is 28.

The square root of 21322846 is about 4617.6667268221. Note that the first 3 decimals coincide. The cubic root of 21322846 is about 277.2990553485.

The spelling of 21322846 in words is "twenty-one million, three hundred twenty-two thousand, eight hundred forty-six".