204534021105 has 32 divisors (see below), whose sum is σ = 366833905920. Its totient is φ = 108119450880.

The previous prime is 204534021089. The next prime is 204534021113. The reversal of 204534021105 is 501120435402.

204534021105 is a `hidden beast` number, since 2 + 0 + 4 + 534 + 0 + 21 + 105 = 666.

It is not a de Polignac number, because 204534021105 - 2⁴ = 204534021089 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6688581 + ... + 6719090.

It is an arithmetic number, because the mean of its divisors is an integer number (11463559560).

Almost surely, 2^204534021105 is an apocalyptic number.

It is an amenable number.

204534021105 is a deficient number, since it is larger than the sum of its proper divisors (162299884815).

204534021105 is a wasteful number, since it uses less digits than its factorization.

204534021105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407798 (or 13407792 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 204534021105 its reverse (501120435402), we get a palindrome (705654456507).

The spelling of 204534021105 in words is "two hundred four billion, five hundred thirty-four million, twenty-one thousand, one hundred five".