21448118 has 8 divisors (see below), whose sum is σ = 34064712. Its totient is φ = 10093216.

The previous prime is 21448079. The next prime is 21448127. The reversal of 21448118 is 81184412.

It is a happy number.

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

It is a congruent number.

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, 315380 + ... + 315447.

It is an arithmetic number, because the mean of its divisors is an integer number (4258089).

Almost surely, 2^21448118 is an apocalyptic number.

21448118 is a deficient number, since it is larger than the sum of its proper divisors (12616594).

21448118 is a wasteful number, since it uses less digits than its factorization.

21448118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630846.

The product of its digits is 2048, while the sum is 29.

The square root of 21448118 is about 4631.2112886371. The cubic root of 21448118 is about 277.8410405363.

The spelling of 21448118 in words is "twenty-one million, four hundred forty-eight thousand, one hundred eighteen".