203123342440 has 32 divisors (see below), whose sum is σ = 457064974080. Its totient is φ = 81242678592.

The previous prime is 203123342393. The next prime is 203123342449. The reversal of 203123342440 is 44243321302.

It is a junction number, because it is equal to n+sod(n) for n = 203123342399 and 203123342408.

It is not an unprimeable number, because it can be changed into a prime (203123342449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301537 + ... + 705103.

It is an arithmetic number, because the mean of its divisors is an integer number (14283280440).

Almost surely, 2^203123342440 is an apocalyptic number.

203123342440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203123342440 is an abundant number, since it is smaller than the sum of its proper divisors (253941631640).

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

203123342440 is a wasteful number, since it uses less digits than its factorization.

203123342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416161 (or 416157 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 203123342440 its reverse (44243321302), we get a palindrome (247366663742).

The spelling of 203123342440 in words is "two hundred three billion, one hundred twenty-three million, three hundred forty-two thousand, four hundred forty".