202134131440 has 20 divisors (see below), whose sum is σ = 469961855784. Its totient is φ = 80853652544.

The previous prime is 202134131371. The next prime is 202134131449. The reversal of 202134131440 is 44131431202.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202134131449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1263338242 + ... + 1263338401.

Almost surely, 2^202134131440 is an apocalyptic number.

202134131440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202134131440 is an abundant number, since it is smaller than the sum of its proper divisors (267827724344).

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

202134131440 is a wasteful number, since it uses less digits than its factorization.

202134131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526676656 (or 2526676650 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 202134131440 its reverse (44131431202), we get a palindrome (246265562642).

The spelling of 202134131440 in words is "two hundred two billion, one hundred thirty-four million, one hundred thirty-one thousand, four hundred forty".