21065466 has 8 divisors (see below), whose sum is σ = 42130944. Its totient is φ = 7021820.

The previous prime is 21065459. The next prime is 21065477. The reversal of 21065466 is 66456012.

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

21065466 is an admirable number.

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, 1755450 + ... + 1755461.

It is an arithmetic number, because the mean of its divisors is an integer number (5266368).

Almost surely, 2^21065466 is an apocalyptic number.

21065466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21065466 is a wasteful number, since it uses less digits than its factorization.

21065466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510916.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 21065466 is about 4589.7130629267. The cubic root of 21065466 is about 276.1788118746.

The spelling of 21065466 in words is "twenty-one million, sixty-five thousand, four hundred sixty-six".