21466634 has 8 divisors (see below), whose sum is σ = 36799968. Its totient is φ = 9199980.

The previous prime is 21466633. The next prime is 21466651. The reversal of 21466634 is 43666412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21466634.

It is not an unprimeable number, because it can be changed into a prime (21466633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766652 + ... + 766679.

It is an arithmetic number, because the mean of its divisors is an integer number (4599996).

Almost surely, 2^21466634 is an apocalyptic number.

21466634 is a deficient number, since it is larger than the sum of its proper divisors (15333334).

21466634 is a wasteful number, since it uses less digits than its factorization.

21466634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533340.

The product of its digits is 20736, while the sum is 32.

The square root of 21466634 is about 4633.2099024327. The cubic root of 21466634 is about 277.9209702378.

The spelling of 21466634 in words is "twenty-one million, four hundred sixty-six thousand, six hundred thirty-four".