201042423140 has 24 divisors (see below), whose sum is σ = 454665172920. Its totient is φ = 74231048448.

The previous prime is 201042423077. The next prime is 201042423143. The reversal of 201042423140 is 41324240102.

It can be written as a sum of positive squares in 4 ways, for example, as 668015716 + 200374407424 = 25846^2 + 447632^2 .

It is not an unprimeable number, because it can be changed into a prime (201042423143) 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 7 ways as a sum of consecutive naturals, for example, 386619785 + ... + 386620304.

It is an arithmetic number, because the mean of its divisors is an integer number (18944382205).

Almost surely, 2^201042423140 is an apocalyptic number.

201042423140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201042423140 is an abundant number, since it is smaller than the sum of its proper divisors (253622749780).

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

201042423140 is a wasteful number, since it uses less digits than its factorization.

201042423140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773240111 (or 773240109 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 201042423140 its reverse (41324240102), we get a palindrome (242366663242).

The spelling of 201042423140 in words is "two hundred one billion, forty-two million, four hundred twenty-three thousand, one hundred forty".