204615440342 has 4 divisors (see below), whose sum is σ = 306923160516. Its totient is φ = 102307720170.

The previous prime is 204615440257. The next prime is 204615440347. The reversal of 204615440342 is 243044516402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243044516402 = 2 ⋅121522258201.

It is a super-2 number, since 2×204615440342² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204615440347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51153860084 + ... + 51153860087.

It is an arithmetic number, because the mean of its divisors is an integer number (76730790129).

Almost surely, 2^204615440342 is an apocalyptic number.

204615440342 is a deficient number, since it is larger than the sum of its proper divisors (102307720174).

204615440342 is a wasteful number, since it uses less digits than its factorization.

204615440342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102307720173.

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 204615440342 its reverse (243044516402), we get a palindrome (447659956744).

The spelling of 204615440342 in words is "two hundred four billion, six hundred fifteen million, four hundred forty thousand, three hundred forty-two".