21543196 has 12 divisors (see below), whose sum is σ = 38047240. Its totient is φ = 10672560.

The previous prime is 21543173. The next prime is 21543211. The reversal of 21543196 is 69134512.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24270 + ... + 25141.

Almost surely, 2^21543196 is an apocalyptic number.

It is an amenable number.

21543196 is a deficient number, since it is larger than the sum of its proper divisors (16504044).

21543196 is a wasteful number, since it uses less digits than its factorization.

21543196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49524 (or 49522 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 21543196 is about 4641.4648549784. The cubic root of 21543196 is about 278.2509853161.

The spelling of 21543196 in words is "twenty-one million, five hundred forty-three thousand, one hundred ninety-six".