20104142 has 4 divisors (see below), whose sum is σ = 30156216. Its totient is φ = 10052070.

The previous prime is 20104141. The next prime is 20104153. The reversal of 20104142 is 24140102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104141) 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 as a sum of consecutive naturals, namely, 5026034 + ... + 5026037.

It is an arithmetic number, because the mean of its divisors is an integer number (7539054).

Almost surely, 2^20104142 is an apocalyptic number.

20104142 is a deficient number, since it is larger than the sum of its proper divisors (10052074).

20104142 is a wasteful number, since it uses less digits than its factorization.

20104142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10052073.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20104142 is about 4483.7642667741. The cubic root of 20104142 is about 271.9120877224.

Adding to 20104142 its reverse (24140102), we get a palindrome (44244244).

The spelling of 20104142 in words is "twenty million, one hundred four thousand, one hundred forty-two".