21149110 has 16 divisors (see below), whose sum is σ = 38232000. Its totient is φ = 8423296.

The previous prime is 21149083. The next prime is 21149129. The reversal of 21149110 is 1194112.

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 7 ways as a sum of consecutive naturals, for example, 2035 + ... + 6814.

It is an arithmetic number, because the mean of its divisors is an integer number (2389500).

Almost surely, 2^21149110 is an apocalyptic number.

21149110 is a deficient number, since it is larger than the sum of its proper divisors (17082890).

21149110 is a wasteful number, since it uses less digits than its factorization.

21149110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9095.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 21149110 is about 4598.8161520113. The cubic root of 21149110 is about 276.5438673755.

The spelling of 21149110 in words is "twenty-one million, one hundred forty-nine thousand, one hundred ten".