21026848 has 12 divisors (see below), whose sum is σ = 41396670. Its totient is φ = 10513408.

The previous prime is 21026839. The next prime is 21026851. The reversal of 21026848 is 84862012.

It can be written as a sum of positive squares in only one way, i.e., 12194064 + 8832784 = 3492^2 + 2972^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328513 + ... + 328576.

Almost surely, 2^21026848 is an apocalyptic number.

It is an amenable number.

21026848 is a deficient number, since it is larger than the sum of its proper divisors (20369822).

21026848 is an equidigital number, since it uses as much as digits as its factorization.

21026848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657099 (or 657091 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 21026848 is about 4585.5041162341. The cubic root of 21026848 is about 276.0099415309.

The spelling of 21026848 in words is "twenty-one million, twenty-six thousand, eight hundred forty-eight".