21548452 has 48 divisors (see below), whose sum is σ = 41912640. Its totient is φ = 9651200.

The previous prime is 21548399. The next prime is 21548491. The reversal of 21548452 is 25484512.

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, 164427 + ... + 164557.

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

Almost surely, 2^21548452 is an apocalyptic number.

It is an amenable number.

21548452 is a deficient number, since it is larger than the sum of its proper divisors (20364188).

21548452 is a wasteful number, since it uses less digits than its factorization.

21548452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 250 counting only the distinct ones).

The product of its digits is 12800, while the sum is 31.

The square root of 21548452 is about 4642.0310210079. The cubic root of 21548452 is about 278.2736122321.

The spelling of 21548452 in words is "twenty-one million, five hundred forty-eight thousand, four hundred fifty-two".