21468842 has 8 divisors (see below), whose sum is σ = 32457216. Its totient is φ = 10649772.

The previous prime is 21468829. The next prime is 21468899. The reversal of 21468842 is 24886412.

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

It is a super-2 number, since 2×21468842² = 921822353641928, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 42008 + ... + 42515.

It is an arithmetic number, because the mean of its divisors is an integer number (4057152).

Almost surely, 2^21468842 is an apocalyptic number.

21468842 is a deficient number, since it is larger than the sum of its proper divisors (10988374).

21468842 is a wasteful number, since it uses less digits than its factorization.

21468842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84652.

The product of its digits is 24576, while the sum is 35.

The square root of 21468842 is about 4633.4481760348. The cubic root of 21468842 is about 277.9304986446.

The spelling of 21468842 in words is "twenty-one million, four hundred sixty-eight thousand, eight hundred forty-two".