20004142 has 16 divisors (see below), whose sum is σ = 31168800. Its totient is φ = 9617440.

The previous prime is 20004139. The next prime is 20004191. The reversal of 20004142 is 24140002.

It is a congruent number.

It is an unprimeable number.

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, 17484 + ... + 18592.

It is an arithmetic number, because the mean of its divisors is an integer number (1948050).

Almost surely, 2^20004142 is an apocalyptic number.

20004142 is a deficient number, since it is larger than the sum of its proper divisors (11164658).

20004142 is a wasteful number, since it uses less digits than its factorization.

20004142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20004142 is about 4472.5990207037. The cubic root of 20004142 is about 271.4604988957.

Adding to 20004142 its reverse (24140002), we get a palindrome (44144144).

The spelling of 20004142 in words is "twenty million, four thousand, one hundred forty-two".