203412022440 has 128 divisors (see below), whose sum is σ = 681949134720. Its totient is φ = 48109260800.

The previous prime is 203412022427. The next prime is 203412022441. The reversal of 203412022440 is 44220214302.

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 203412022440.

It is not an unprimeable number, because it can be changed into a prime (203412022441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1825149 + ... + 1933388.

It is an arithmetic number, because the mean of its divisors is an integer number (5327727615).

Almost surely, 2^203412022440 is an apocalyptic number.

203412022440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203412022440 is an abundant number, since it is smaller than the sum of its proper divisors (478537112280).

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

203412022440 is a wasteful number, since it uses less digits than its factorization.

203412022440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758603 (or 3758599 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 203412022440 its reverse (44220214302), we get a palindrome (247632236742).

The spelling of 203412022440 in words is "two hundred three billion, four hundred twelve million, twenty-two thousand, four hundred forty".