21323048 has 16 divisors (see below), whose sum is σ = 40488000. Its totient is φ = 10526256.

The previous prime is 21323021. The next prime is 21323053. The reversal of 21323048 is 84032312.

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 3 ways as a sum of consecutive naturals, for example, 16238 + ... + 17501.

It is an arithmetic number, because the mean of its divisors is an integer number (2530500).

Almost surely, 2^21323048 is an apocalyptic number.

It is an amenable number.

21323048 is a deficient number, since it is larger than the sum of its proper divisors (19164952).

21323048 is a wasteful number, since it uses less digits than its factorization.

21323048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33824 (or 33820 counting only the distinct ones).

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

The square root of 21323048 is about 4617.6885992886. The cubic root of 21323048 is about 277.2999310014.

It can be divided in two parts, 2132304 and 8, that added together give a palindrome (2132312).

The spelling of 21323048 in words is "twenty-one million, three hundred twenty-three thousand, forty-eight".