21548148 has 48 divisors (see below), whose sum is σ = 53053056. Its totient is φ = 6793600.

The previous prime is 21548143. The next prime is 21548159. The reversal of 21548148 is 84184512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21548141) by changing a digit.

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, 27490 + ... + 28262.

It is an arithmetic number, because the mean of its divisors is an integer number (1105272).

Almost surely, 2^21548148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21548148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26526528).

21548148 is an abundant number, since it is smaller than the sum of its proper divisors (31504908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21548148 is a wasteful number, since it uses less digits than its factorization.

21548148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 902 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 21548148 is about 4641.9982766046. The cubic root of 21548148 is about 278.2723036218.

The spelling of 21548148 in words is "twenty-one million, five hundred forty-eight thousand, one hundred forty-eight".