21466454 has 4 divisors (see below), whose sum is σ = 32199684. Its totient is φ = 10733226.

The previous prime is 21466441. The next prime is 21466457. The reversal of 21466454 is 45466412.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21466454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5366612 + ... + 5366615.

It is an arithmetic number, because the mean of its divisors is an integer number (8049921).

Almost surely, 2^21466454 is an apocalyptic number.

21466454 is a deficient number, since it is larger than the sum of its proper divisors (10733230).

21466454 is a wasteful number, since it uses less digits than its factorization.

21466454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10733229.

The product of its digits is 23040, while the sum is 32.

The square root of 21466454 is about 4633.1904774140. The cubic root of 21466454 is about 277.9201934367.

The spelling of 21466454 in words is "twenty-one million, four hundred sixty-six thousand, four hundred fifty-four".