21194044 has 24 divisors (see below), whose sum is σ = 40102160. Its totient is φ = 9766656.

The previous prime is 21194029. The next prime is 21194077. The reversal of 21194044 is 44049112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957 + ... + 6580.

Almost surely, 2^21194044 is an apocalyptic number.

It is an amenable number.

21194044 is a deficient number, since it is larger than the sum of its proper divisors (18908116).

21194044 is a wasteful number, since it uses less digits than its factorization.

21194044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597 (or 7595 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 21194044 is about 4603.6989475855. The cubic root of 21194044 is about 276.7395798214.

The spelling of 21194044 in words is "twenty-one million, one hundred ninety-four thousand, forty-four".