203112042423440 has 80 divisors (see below), whose sum is σ = 484947611366400. Its totient is φ = 79076887534080.

The previous prime is 203112042423427. The next prime is 203112042423457. The reversal of 203112042423440 is 44324240211302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×203112042423440² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203112042423397 and 203112042423406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148543640 + ... + 149904759.

It is an arithmetic number, because the mean of its divisors is an integer number (6061845142080).

Almost surely, 2^{203112042423440} is an apocalyptic number.

203112042423440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203112042423440 is an abundant number, since it is smaller than the sum of its proper divisors (281835568942960).

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

203112042423440 is a wasteful number, since it uses less digits than its factorization.

203112042423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298448640 (or 298448634 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 203112042423440 its reverse (44324240211302), we get a palindrome (247436282634742).

The spelling of 203112042423440 in words is "two hundred three trillion, one hundred twelve billion, forty-two million, four hundred twenty-three thousand, four hundred forty".