20004994 has 16 divisors (see below), whose sum is σ = 30614688. Its totient is φ = 9801792.

The previous prime is 20004979. The next prime is 20004997. The reversal of 20004994 is 49940002.

It is not an unprimeable number, because it can be changed into a prime (20004997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44937 + ... + 45379.

It is an arithmetic number, because the mean of its divisors is an integer number (1913418).

Almost surely, 2^20004994 is an apocalyptic number.

20004994 is a deficient number, since it is larger than the sum of its proper divisors (10609694).

20004994 is a wasteful number, since it uses less digits than its factorization.

20004994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20004994 is about 4472.6942663232. The cubic root of 20004994 is about 271.4643527819.

Adding to 20004994 its reverse (49940002), we get a palindrome (69944996).

The spelling of 20004994 in words is "twenty million, four thousand, nine hundred ninety-four".