21448066 has 8 divisors (see below), whose sum is σ = 32192784. Its totient is φ = 10717140.

The previous prime is 21448051. The next prime is 21448079. The reversal of 21448066 is 66084412.

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

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, 2481 + ... + 7003.

It is an arithmetic number, because the mean of its divisors is an integer number (4024098).

Almost surely, 2^21448066 is an apocalyptic number.

21448066 is a deficient number, since it is larger than the sum of its proper divisors (10744718).

21448066 is a wasteful number, since it uses less digits than its factorization.

21448066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6896.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 21448066 is about 4631.2056745517. The cubic root of 21448066 is about 277.8408159984.

The spelling of 21448066 in words is "twenty-one million, four hundred forty-eight thousand, sixty-six".