21068480 has 28 divisors (see below), whose sum is σ = 50170080. Its totient is φ = 8427264.

The previous prime is 21068477. The next prime is 21068513. The reversal of 21068480 is 8486012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32600 + ... + 33239.

Almost surely, 2^21068480 is an apocalyptic number.

21068480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21068480 is an abundant number, since it is smaller than the sum of its proper divisors (29101600).

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

21068480 is an equidigital number, since it uses as much as digits as its factorization.

21068480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65856 (or 65846 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 21068480 is about 4590.0413941489. The cubic root of 21068480 is about 276.1919829297.

The spelling of 21068480 in words is "twenty-one million, sixty-eight thousand, four hundred eighty".