203123230340 has 48 divisors (see below), whose sum is σ = 434858962608. Its totient is φ = 79670083584.

The previous prime is 203123230319. The next prime is 203123230397. The reversal of 203123230340 is 43032321302.

It can be written as a sum of positive squares in 8 ways, for example, as 55931304004 + 147191926336 = 236498^2 + 383656^2 .

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 1803524 + ... + 1912836.

It is an arithmetic number, because the mean of its divisors is an integer number (9059561721).

Almost surely, 2^203123230340 is an apocalyptic number.

203123230340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203123230340 is an abundant number, since it is smaller than the sum of its proper divisors (231735732268).

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

203123230340 is a wasteful number, since it uses less digits than its factorization.

203123230340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111128 (or 111126 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 203123230340 its reverse (43032321302), we get a palindrome (246155551642).

The spelling of 203123230340 in words is "two hundred three billion, one hundred twenty-three million, two hundred thirty thousand, three hundred forty".