21332048 has 10 divisors (see below), whose sum is σ = 41330874. Its totient is φ = 10666016.

The previous prime is 21332029. The next prime is 21332053. The reversal of 21332048 is 84023312.

It can be written as a sum of positive squares in only one way, i.e., 21270544 + 61504 = 4612^2 + 248^2 .

It is a congruent number.

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, 666611 + ... + 666642.

Almost surely, 2^21332048 is an apocalyptic number.

It is an amenable number.

21332048 is a deficient number, since it is larger than the sum of its proper divisors (19998826).

21332048 is a wasteful number, since it uses less digits than its factorization.

21332048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333261 (or 1333255 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21332048 is about 4618.6630100063. The cubic root of 21332048 is about 277.3389396261.

The spelling of 21332048 in words is "twenty-one million, three hundred thirty-two thousand, forty-eight".