21634796 has 12 divisors (see below), whose sum is σ = 37894248. Its totient is φ = 10807872.

The previous prime is 21634741. The next prime is 21634799. The reversal of 21634796 is 69743612.

It is not an unprimeable number, because it can be changed into a prime (21634799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6020 + ... + 8916.

It is an arithmetic number, because the mean of its divisors is an integer number (3157854).

Almost surely, 2^21634796 is an apocalyptic number.

It is an amenable number.

21634796 is a deficient number, since it is larger than the sum of its proper divisors (16259452).

21634796 is a wasteful number, since it uses less digits than its factorization.

21634796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768 (or 4766 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 21634796 is about 4651.3219626252. The cubic root of 21634796 is about 278.6447949023.

The spelling of 21634796 in words is "twenty-one million, six hundred thirty-four thousand, seven hundred ninety-six".