20184242 has 8 divisors (see below), whose sum is σ = 32605356. Its totient is φ = 9315792.

The previous prime is 20184239. The next prime is 20184247. The reversal of 20184242 is 24248102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18412681 + 1771561 = 4291^2 + 1331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20184242² = 814807250229128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20184247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388133 + ... + 388184.

Almost surely, 2^20184242 is an apocalyptic number.

20184242 is a deficient number, since it is larger than the sum of its proper divisors (12421114).

20184242 is a wasteful number, since it uses less digits than its factorization.

20184242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776332.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20184242 is about 4492.6876143351. The cubic root of 20184242 is about 272.2727314178.

The spelling of 20184242 in words is "twenty million, one hundred eighty-four thousand, two hundred forty-two".