21194361 has 12 divisors (see below), whose sum is σ = 30654000. Its totient is φ = 14111160.

The previous prime is 21194353. The next prime is 21194387. The reversal of 21194361 is 16349112.

21194361 is a `hidden beast` number, since 211 + 94 + 361 = 666.

It is not a de Polignac number, because 21194361 - 2³ = 21194353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21194351) 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 11 ways as a sum of consecutive naturals, for example, 12706 + ... + 14276.

It is an arithmetic number, because the mean of its divisors is an integer number (2554500).

Almost surely, 2^21194361 is an apocalyptic number.

It is an amenable number.

21194361 is a deficient number, since it is larger than the sum of its proper divisors (9459639).

21194361 is a wasteful number, since it uses less digits than its factorization.

21194361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076 (or 3073 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 21194361 is about 4603.7333762936. The cubic root of 21194361 is about 276.7409595488.

The spelling of 21194361 in words is "twenty-one million, one hundred ninety-four thousand, three hundred sixty-one".