21044094 has 16 divisors (see below), whose sum is σ = 42271632. Its totient is φ = 6984128.

The previous prime is 21044081. The next prime is 21044117. The reversal of 21044094 is 49044012.

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, 6129 + ... + 8924.

It is an arithmetic number, because the mean of its divisors is an integer number (2641977).

Almost surely, 2^21044094 is an apocalyptic number.

21044094 is an abundant number, since it is smaller than the sum of its proper divisors (21227538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21044094 is a wasteful number, since it uses less digits than its factorization.

21044094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15291.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21044094 is about 4587.3842219723. The cubic root of 21044094 is about 276.0853810619.

The spelling of 21044094 in words is "twenty-one million, forty-four thousand, ninety-four".