21448124 has 12 divisors (see below), whose sum is σ = 37566984. Its totient is φ = 10714704.

The previous prime is 21448079. The next prime is 21448127. The reversal of 21448124 is 42184412.

It is a junction number, because it is equal to n+sod(n) for n = 21448093 and 21448102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21448127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6674 + ... + 9350.

It is an arithmetic number, because the mean of its divisors is an integer number (3130582).

Almost surely, 2^21448124 is an apocalyptic number.

It is an amenable number.

21448124 is a deficient number, since it is larger than the sum of its proper divisors (16118860).

21448124 is a wasteful number, since it uses less digits than its factorization.

21448124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684 (or 4682 counting only the distinct ones).

The product of its digits is 2048, while the sum is 26.

The square root of 21448124 is about 4631.2119364158. The cubic root of 21448124 is about 277.8410664445.

The spelling of 21448124 in words is "twenty-one million, four hundred forty-eight thousand, one hundred twenty-four".