204742474673 has 4 divisors (see below), whose sum is σ = 223355426928. Its totient is φ = 186129522420.

The previous prime is 204742474663. The next prime is 204742474681. The reversal of 204742474673 is 376474247402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204742474673 - 2¹² = 204742470577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204742474663) 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, 9306476111 + ... + 9306476132.

It is an arithmetic number, because the mean of its divisors is an integer number (55838856732).

Almost surely, 2^204742474673 is an apocalyptic number.

It is an amenable number.

204742474673 is a deficient number, since it is larger than the sum of its proper divisors (18612952255).

204742474673 is a wasteful number, since it uses less digits than its factorization.

204742474673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18612952254.

The product of its (nonzero) digits is 6322176, while the sum is 50.

The spelling of 204742474673 in words is "two hundred four billion, seven hundred forty-two million, four hundred seventy-four thousand, six hundred seventy-three".