203123031140 has 48 divisors (see below), whose sum is σ = 435696033024. Its totient is φ = 79509196800.

The previous prime is 203123031121. The next prime is 203123031143. The reversal of 203123031140 is 41130321302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (203123031143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10227620 + ... + 10247460.

It is an arithmetic number, because the mean of its divisors is an integer number (9077000688).

Almost surely, 2^203123031140 is an apocalyptic number.

203123031140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203123031140 is an abundant number, since it is smaller than the sum of its proper divisors (232573001884).

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

203123031140 is a wasteful number, since it uses less digits than its factorization.

203123031140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30788 (or 30786 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203123031140 its reverse (41130321302), we get a palindrome (244253352442).

The spelling of 203123031140 in words is "two hundred three billion, one hundred twenty-three million, thirty-one thousand, one hundred forty".