203344400120040 has 80 divisors (see below), whose sum is σ = 683463122636580. Its totient is φ = 54225173364480.

The previous prime is 203344400120039. The next prime is 203344400120047. The reversal of 203344400120040 is 40021004443302.

It is a happy number.

203344400120040 is a `hidden beast` number, since 20 + 3 + 34 + 4 + 400 + 1 + 200 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 183295910297124 + 20048489822916 = 13538682^2 + 4477554^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 203344400119986 and 203344400120013.

It is not an unprimeable number, because it can be changed into a prime (203344400120047) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31380305421 + ... + 31380311900.

Almost surely, 2^{203344400120040} is an apocalyptic number.

203344400120040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203344400120040 is an abundant number, since it is smaller than the sum of its proper divisors (480118722516540).

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

203344400120040 is a wasteful number, since it uses less digits than its factorization.

203344400120040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62760617344 (or 62760617331 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 203344400120040 its reverse (40021004443302), we get a palindrome (243365404563342).

The spelling of 203344400120040 in words is "two hundred three trillion, three hundred forty-four billion, four hundred million, one hundred twenty thousand, forty".