205104002136 has 64 divisors (see below), whose sum is σ = 559698577920. Its totient is φ = 62116725120.

The previous prime is 205104002111. The next prime is 205104002183. The reversal of 205104002136 is 631200401502.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233361 + ... + 681663.

It is an arithmetic number, because the mean of its divisors is an integer number (8745290280).

Almost surely, 2^205104002136 is an apocalyptic number.

It is an amenable number.

205104002136 is an abundant number, since it is smaller than the sum of its proper divisors (354594575784).

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

205104002136 is a wasteful number, since it uses less digits than its factorization.

205104002136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450056 (or 450052 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 205104002136 its reverse (631200401502), we get a palindrome (836304403638).

The spelling of 205104002136 in words is "two hundred five billion, one hundred four million, two thousand, one hundred thirty-six".