20194249 has 4 divisors (see below), whose sum is σ = 21382164. Its totient is φ = 19006336.

The previous prime is 20194241. The next prime is 20194259. The reversal of 20194249 is 94249102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10627600 + 9566649 = 3260^2 + 3093^2 .

It is a cyclic number.

It is not a de Polignac number, because 20194249 - 2³ = 20194241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20194249.

It is not an unprimeable number, because it can be changed into a prime (20194241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593932 + ... + 593965.

It is an arithmetic number, because the mean of its divisors is an integer number (5345541).

Almost surely, 2^20194249 is an apocalyptic number.

It is an amenable number.

20194249 is a deficient number, since it is larger than the sum of its proper divisors (1187915).

20194249 is a wasteful number, since it uses less digits than its factorization.

20194249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187914.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20194249 is about 4493.8011749520. The cubic root of 20194249 is about 272.3177200295.

The spelling of 20194249 in words is "twenty million, one hundred ninety-four thousand, two hundred forty-nine".