21110494 has 16 divisors (see below), whose sum is σ = 32316048. Its totient is φ = 10340352.

The previous prime is 21110489. The next prime is 21110497. The reversal of 21110494 is 49401112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110497) 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 7 ways as a sum of consecutive naturals, for example, 34132 + ... + 34744.

It is an arithmetic number, because the mean of its divisors is an integer number (2019753).

Almost surely, 2^21110494 is an apocalyptic number.

21110494 is a deficient number, since it is larger than the sum of its proper divisors (11205554).

21110494 is a wasteful number, since it uses less digits than its factorization.

21110494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 21110494 is about 4594.6157619544. The cubic root of 21110494 is about 276.3754517122.

The spelling of 21110494 in words is "twenty-one million, one hundred ten thousand, four hundred ninety-four".