204723994245 has 16 divisors (see below), whose sum is σ = 327566840832. Its totient is φ = 109183313600.

The previous prime is 204723994231. The next prime is 204723994247. The reversal of 204723994245 is 542499327402.

It is not a de Polignac number, because 204723994245 - 2¹⁹ = 204723469957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204723994247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511399 + ... + 819131.

It is an arithmetic number, because the mean of its divisors is an integer number (20472927552).

Almost surely, 2^204723994245 is an apocalyptic number.

It is an amenable number.

204723994245 is a deficient number, since it is larger than the sum of its proper divisors (122842846587).

204723994245 is a wasteful number, since it uses less digits than its factorization.

204723994245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352092.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 204723994245 in words is "two hundred four billion, seven hundred twenty-three million, nine hundred ninety-four thousand, two hundred forty-five".