204240134343311 has 4 divisors (see below), whose sum is σ = 222807419283624. Its totient is φ = 185672849403000.

The previous prime is 204240134343241. The next prime is 204240134343359. The reversal of 204240134343311 is 113343431042402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204240134343311 - 2⁴⁶ = 133871390165647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204240134343911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9283642470140 + ... + 9283642470161.

It is an arithmetic number, because the mean of its divisors is an integer number (55701854820906).

Almost surely, 2^{204240134343311} is an apocalyptic number.

204240134343311 is a deficient number, since it is larger than the sum of its proper divisors (18567284940313).

204240134343311 is a wasteful number, since it uses less digits than its factorization.

204240134343311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18567284940312.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 204240134343311 its reverse (113343431042402), we get a palindrome (317583565385713).

The spelling of 204240134343311 in words is "two hundred four trillion, two hundred forty billion, one hundred thirty-four million, three hundred forty-three thousand, three hundred eleven".