21371848 has 16 divisors (see below), whose sum is σ = 40441500. Its totient is φ = 10587456.

The previous prime is 21371843. The next prime is 21371849. The reversal of 21371848 is 84817312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18818244 + 2553604 = 4338^2 + 1598^2 .

It is not an unprimeable number, because it can be changed into a prime (21371843) 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 3 ways as a sum of consecutive naturals, for example, 11383 + ... + 13126.

Almost surely, 2^21371848 is an apocalyptic number.

It is an amenable number.

21371848 is a deficient number, since it is larger than the sum of its proper divisors (19069652).

21371848 is a wasteful number, since it uses less digits than its factorization.

21371848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24624 (or 24620 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 21371848 is about 4622.9696083794. The cubic root of 21371848 is about 277.5113130144.

The spelling of 21371848 in words is "twenty-one million, three hundred seventy-one thousand, eight hundred forty-eight".