21332996 has 6 divisors (see below), whose sum is σ = 37332750. Its totient is φ = 10666496.

The previous prime is 21332963. The next prime is 21333007. The reversal of 21332996 is 69923312.

It can be written as a sum of positive squares in only one way, i.e., 19483396 + 1849600 = 4414^2 + 1360^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2666621 + ... + 2666628.

It is an arithmetic number, because the mean of its divisors is an integer number (6222125).

Almost surely, 2^21332996 is an apocalyptic number.

It is an amenable number.

21332996 is a deficient number, since it is larger than the sum of its proper divisors (15999754).

21332996 is a wasteful number, since it uses less digits than its factorization.

21332996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5333253 (or 5333251 counting only the distinct ones).

The product of its digits is 17496, while the sum is 35.

The square root of 21332996 is about 4618.7656359681. The cubic root of 21332996 is about 277.3430478959.

The spelling of 21332996 in words is "twenty-one million, three hundred thirty-two thousand, nine hundred ninety-six".