21068026 has 8 divisors (see below), whose sum is σ = 36116640. Its totient is φ = 9029148.

The previous prime is 21068011. The next prime is 21068027. The reversal of 21068026 is 62086012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21068027) 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, 752416 + ... + 752443.

It is an arithmetic number, because the mean of its divisors is an integer number (4514580).

Almost surely, 2^21068026 is an apocalyptic number.

21068026 is a deficient number, since it is larger than the sum of its proper divisors (15048614).

21068026 is a wasteful number, since it uses less digits than its factorization.

21068026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504868.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21068026 is about 4589.9919389907. The cubic root of 21068026 is about 276.1899990489.

The spelling of 21068026 in words is "twenty-one million, sixty-eight thousand, twenty-six".