21466248 has 16 divisors (see below), whose sum is σ = 53665680. Its totient is φ = 7155408.

The previous prime is 21466243. The next prime is 21466259. The reversal of 21466248 is 84266412.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21466243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447190 + ... + 447237.

It is an arithmetic number, because the mean of its divisors is an integer number (3354105).

Almost surely, 2^21466248 is an apocalyptic number.

It is an amenable number.

21466248 is an abundant number, since it is smaller than the sum of its proper divisors (32199432).

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

21466248 is a wasteful number, since it uses less digits than its factorization.

21466248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894436 (or 894432 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 21466248 is about 4633.1682464594. The cubic root of 21466248 is about 277.9193044257.

The spelling of 21466248 in words is "twenty-one million, four hundred sixty-six thousand, two hundred forty-eight".