21466342 has 12 divisors (see below), whose sum is σ = 34205940. Its totient is φ = 10101536.

The previous prime is 21466297. The next prime is 21466349. The reversal of 21466342 is 24366412.

It is a self number, because there is not a number n which added to its sum of digits gives 21466342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466349) 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 in 5 ways as a sum of consecutive naturals, for example, 17992 + ... + 19147.

It is an arithmetic number, because the mean of its divisors is an integer number (2850495).

Almost surely, 2^21466342 is an apocalyptic number.

21466342 is a deficient number, since it is larger than the sum of its proper divisors (12739598).

21466342 is a wasteful number, since it uses less digits than its factorization.

21466342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37175 (or 37158 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 21466342 is about 4633.1783906947. The cubic root of 21466342 is about 277.9197100916.

The spelling of 21466342 in words is "twenty-one million, four hundred sixty-six thousand, three hundred forty-two".