20120104142 has 4 divisors (see below), whose sum is σ = 30180156216. Its totient is φ = 10060052070.

The previous prime is 20120104141. The next prime is 20120104183. The reversal of 20120104142 is 24140102102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20120104142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120104141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030026034 + ... + 5030026037.

It is an arithmetic number, because the mean of its divisors is an integer number (7545039054).

Almost surely, 2^20120104142 is an apocalyptic number.

20120104142 is a deficient number, since it is larger than the sum of its proper divisors (10060052074).

20120104142 is a wasteful number, since it uses less digits than its factorization.

20120104142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060052073.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20120104142 its reverse (24140102102), we get a palindrome (44260206244).

The spelling of 20120104142 in words is "twenty billion, one hundred twenty million, one hundred four thousand, one hundred forty-two".