203400120112440 has 32 divisors (see below), whose sum is σ = 610200360337680. Its totient is φ = 54240032029952.

The previous prime is 203400120112433. The next prime is 203400120112499. The reversal of 203400120112440 is 44211021004302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 203400120112440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 847500500349 + ... + 847500500588.

Almost surely, 2^{203400120112440} is an apocalyptic number.

203400120112440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203400120112440 is an abundant number, since it is smaller than the sum of its proper divisors (406800240225240).

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

203400120112440 is a wasteful number, since it uses less digits than its factorization.

203400120112440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695001000951 (or 1695001000947 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 203400120112440 its reverse (44211021004302), we get a palindrome (247611141116742).

The spelling of 203400120112440 in words is "two hundred three trillion, four hundred billion, one hundred twenty million, one hundred twelve thousand, four hundred forty".