21466382 has 8 divisors (see below), whose sum is σ = 36799536. Its totient is φ = 9199872.

The previous prime is 21466381. The next prime is 21466397. The reversal of 21466382 is 28366412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466381) 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, 766643 + ... + 766670.

It is an arithmetic number, because the mean of its divisors is an integer number (4599942).

Almost surely, 2^21466382 is an apocalyptic number.

21466382 is a deficient number, since it is larger than the sum of its proper divisors (15333154).

21466382 is a wasteful number, since it uses less digits than its factorization.

21466382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533322.

The product of its digits is 13824, while the sum is 32.

The square root of 21466382 is about 4633.1827073838. The cubic root of 21466382 is about 277.9198827151.

The spelling of 21466382 in words is "twenty-one million, four hundred sixty-six thousand, three hundred eighty-two".