21344846 has 16 divisors (see below), whose sum is σ = 33037200. Its totient is φ = 10336320.

The previous prime is 21344839. The next prime is 21344857. The reversal of 21344846 is 64844312.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11345 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (2064825).

Almost surely, 2^21344846 is an apocalyptic number.

21344846 is a deficient number, since it is larger than the sum of its proper divisors (11692354).

21344846 is a wasteful number, since it uses less digits than its factorization.

21344846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939.

The product of its digits is 18432, while the sum is 32.

The square root of 21344846 is about 4620.0482681461. The cubic root of 21344846 is about 277.3943910011.

The spelling of 21344846 in words is "twenty-one million, three hundred forty-four thousand, eight hundred forty-six".