20042006 has 4 divisors (see below), whose sum is σ = 30063012. Its totient is φ = 10021002.

The previous prime is 20041981. The next prime is 20042041. The reversal of 20042006 is 60024002.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5010500 + ... + 5010503.

It is an arithmetic number, because the mean of its divisors is an integer number (7515753).

Almost surely, 2^20042006 is an apocalyptic number.

20042006 is a deficient number, since it is larger than the sum of its proper divisors (10021006).

20042006 is a wasteful number, since it uses less digits than its factorization.

20042006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021005.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20042006 is about 4476.8299051896. The cubic root of 20042006 is about 271.6316651474.

Adding to 20042006 its reverse (60024002), we get a palindrome (80066008).

The spelling of 20042006 in words is "twenty million, forty-two thousand, six".