21824196 has 24 divisors (see below), whose sum is σ = 51002784. Its totient is φ = 7263360.

The previous prime is 21824189. The next prime is 21824197. The reversal of 21824196 is 69142812.

It is not an unprimeable number, because it can be changed into a prime (21824197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10716 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (2125116).

Almost surely, 2^21824196 is an apocalyptic number.

It is an amenable number.

21824196 is an abundant number, since it is smaller than the sum of its proper divisors (29178588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21824196 is a wasteful number, since it uses less digits than its factorization.

21824196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851 (or 2849 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 21824196 is about 4671.6374003127. The cubic root of 21824196 is about 279.4555576988.

The spelling of 21824196 in words is "twenty-one million, eight hundred twenty-four thousand, one hundred ninety-six".