20490194 has 16 divisors (see below), whose sum is σ = 33108480. Its totient is φ = 9482880.

The previous prime is 20490191. The next prime is 20490199. The reversal of 20490194 is 49109402.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20490191) 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, 5759 + ... + 8610.

It is an arithmetic number, because the mean of its divisors is an integer number (2069280).

Almost surely, 2^20490194 is an apocalyptic number.

20490194 is a deficient number, since it is larger than the sum of its proper divisors (12618286).

20490194 is a wasteful number, since it uses less digits than its factorization.

20490194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14425.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20490194 is about 4526.6095479951. The cubic root of 20490194 is about 273.6415384563.

Adding to 20490194 its reverse (49109402), we get a palindrome (69599596).

The spelling of 20490194 in words is "twenty million, four hundred ninety thousand, one hundred ninety-four".