20318194 has 24 divisors (see below), whose sum is σ = 33730560. Its totient is φ = 9170928.

The previous prime is 20318189. The next prime is 20318197. The reversal of 20318194 is 49181302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20318197) 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, 15247 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (1405440).

Almost surely, 2^20318194 is an apocalyptic number.

20318194 is a deficient number, since it is larger than the sum of its proper divisors (13412366).

20318194 is a wasteful number, since it uses less digits than its factorization.

20318194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20318194 is about 4507.5707426506. The cubic root of 20318194 is about 272.8737133211.

Adding to 20318194 its reverse (49181302), we get a palindrome (69499496).

The spelling of 20318194 in words is "twenty million, three hundred eighteen thousand, one hundred ninety-four".