21044158 has 8 divisors (see below), whose sum is σ = 31879080. Its totient is φ = 10417800.

The previous prime is 21044129. The next prime is 21044197. The reversal of 21044158 is 85144012.

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, 51888 + ... + 52291.

It is an arithmetic number, because the mean of its divisors is an integer number (3984885).

Almost surely, 2^21044158 is an apocalyptic number.

21044158 is a deficient number, since it is larger than the sum of its proper divisors (10834922).

21044158 is a wasteful number, since it uses less digits than its factorization.

21044158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104282.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 21044158 is about 4587.3911976198. The cubic root of 21044158 is about 276.0856609417.

The spelling of 21044158 in words is "twenty-one million, forty-four thousand, one hundred fifty-eight".