21194214 has 16 divisors (see below), whose sum is σ = 42449520. Its totient is φ = 7054560.

The previous prime is 21194213. The next prime is 21194219. The reversal of 21194214 is 41249112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21194213) 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, 2844 + ... + 7104.

It is an arithmetic number, because the mean of its divisors is an integer number (2653095).

Almost surely, 2^21194214 is an apocalyptic number.

21194214 is an abundant number, since it is smaller than the sum of its proper divisors (21255306).

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

21194214 is a wasteful number, since it uses less digits than its factorization.

21194214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095.

The product of its digits is 576, while the sum is 24.

The square root of 21194214 is about 4603.7174109626. The cubic root of 21194214 is about 276.7403197400.

The spelling of 21194214 in words is "twenty-one million, one hundred ninety-four thousand, two hundred fourteen".