21983344 has 10 divisors (see below), whose sum is σ = 42592760. Its totient is φ = 10991664.

The previous prime is 21983327. The next prime is 21983369. The reversal of 21983344 is 44338912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686964 + ... + 686995.

It is an arithmetic number, because the mean of its divisors is an integer number (4259276).

Almost surely, 2^21983344 is an apocalyptic number.

It is an amenable number.

21983344 is a deficient number, since it is larger than the sum of its proper divisors (20609416).

21983344 is a wasteful number, since it uses less digits than its factorization.

21983344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373967 (or 1373961 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 21983344 is about 4688.6398880699. The cubic root of 21983344 is about 280.1332019291.

The spelling of 21983344 in words is "twenty-one million, nine hundred eighty-three thousand, three hundred forty-four".