21283796 has 48 divisors (see below), whose sum is σ = 41912640. Its totient is φ = 9408000.

The previous prime is 21283777. The next prime is 21283841. The reversal of 21283796 is 69738212.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its 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 15 ways as a sum of consecutive naturals, for example, 84671 + ... + 84921.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^21283796 is an apocalyptic number.

It is an amenable number.

21283796 is a deficient number, since it is larger than the sum of its proper divisors (20628844).

21283796 is a wasteful number, since it uses less digits than its factorization.

21283796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 342 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 21283796 is about 4613.4364632018. The cubic root of 21283796 is about 277.1296729376.

The spelling of 21283796 in words is "twenty-one million, two hundred eighty-three thousand, seven hundred ninety-six".