20123201142 has 40 divisors (see below), whose sum is σ = 49190051592. Its totient is φ = 6097939200.

The previous prime is 20123201141. The next prime is 20123201177. The reversal of 20123201142 is 24110232102.

It is a happy number.

20123201142 is a `hidden beast` number, since 201 + 2 + 320 + 1 + 142 = 666.

20123201142 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123201141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5644459 + ... + 5648022.

Almost surely, 2^20123201142 is an apocalyptic number.

20123201142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20123201142 is an abundant number, since it is smaller than the sum of its proper divisors (29066850450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123201142 is a wasteful number, since it uses less digits than its factorization.

20123201142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11292506 (or 11292497 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20123201142 its reverse (24110232102), we get a palindrome (44233433244).

The spelling of 20123201142 in words is "twenty billion, one hundred twenty-three million, two hundred one thousand, one hundred forty-two".