21143296 has 18 divisors (see below), whose sum is σ = 42204512. Its totient is φ = 10571520.

The previous prime is 21143293. The next prime is 21143327. The reversal of 21143296 is 69234112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41040 + ... + 41551.

Almost surely, 2^21143296 is an apocalyptic number.

It is an amenable number.

21143296 is a deficient number, since it is larger than the sum of its proper divisors (21061216).

21143296 is an frugal number, since it uses more digits than its factorization.

21143296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82607 (or 82593 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 21143296 is about 4598.1839893593. The cubic root of 21143296 is about 276.5185239386.

The spelling of 21143296 in words is "twenty-one million, one hundred forty-three thousand, two hundred ninety-six".