204542245403 has 16 divisors (see below), whose sum is σ = 215680043040. Its totient is φ = 193441996800.

The previous prime is 204542245399. The next prime is 204542245423. The reversal of 204542245403 is 304542245402.

It is a cyclic number.

It is not a de Polignac number, because 204542245403 - 2² = 204542245399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204542245423) 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, 37045283 + ... + 37050803.

It is an arithmetic number, because the mean of its divisors is an integer number (13480002690).

Almost surely, 2^204542245403 is an apocalyptic number.

204542245403 is a deficient number, since it is larger than the sum of its proper divisors (11137797637).

204542245403 is a wasteful number, since it uses less digits than its factorization.

204542245403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8558.

The product of its (nonzero) digits is 153600, while the sum is 35.

Subtracting 204542245403 from its reverse (304542245402), we obtain a palindrome (99999999999).

The spelling of 204542245403 in words is "two hundred four billion, five hundred forty-two million, two hundred forty-five thousand, four hundred three".