21448966 has 48 divisors (see below), whose sum is σ = 41442192. Its totient is φ = 8232000.

The previous prime is 21448961. The next prime is 21449083. The reversal of 21448966 is 66984412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21448961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108780 + ... + 108976.

It is an arithmetic number, because the mean of its divisors is an integer number (863379).

Almost surely, 2^21448966 is an apocalyptic number.

21448966 is a deficient number, since it is larger than the sum of its proper divisors (19993226).

21448966 is a wasteful number, since it uses less digits than its factorization.

21448966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 318 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 21448966 is about 4631.3028404543. The cubic root of 21448966 is about 277.8447021799.

The spelling of 21448966 in words is "twenty-one million, four hundred forty-eight thousand, nine hundred sixty-six".