204013311302440 has 16 divisors (see below), whose sum is σ = 459029950430580. Its totient is φ = 81605324520960.

The previous prime is 204013311302407. The next prime is 204013311302443. The reversal of 204013311302440 is 44203113310402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 203656474722276 + 356836580164 = 14270826^2 + 597358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204013311302399 and 204013311302408.

It is not an unprimeable number, because it can be changed into a prime (204013311302443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550166391241 + ... + 2550166391320.

Almost surely, 2^{204013311302440} is an apocalyptic number.

204013311302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204013311302440 is an abundant number, since it is smaller than the sum of its proper divisors (255016639128140).

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

204013311302440 is a wasteful number, since it uses less digits than its factorization.

204013311302440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100332782572 (or 5100332782568 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 204013311302440 its reverse (44203113310402), we get a palindrome (248216424612842).

The spelling of 204013311302440 in words is "two hundred four trillion, thirteen billion, three hundred eleven million, three hundred two thousand, four hundred forty".