204435254023 has 16 divisors (see below), whose sum is σ = 274486496256. Its totient is φ = 147046335840.

The previous prime is 204435254017. The next prime is 204435254029. The reversal of 204435254023 is 320452534402.

It is an interprime number because it is at equal distance from previous prime (204435254017) and next prime (204435254029).

It is a cyclic number.

It is not a de Polignac number, because 204435254023 - 2⁵ = 204435253991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204435254023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204435254029) 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, 102114511 + ... + 102116512.

It is an arithmetic number, because the mean of its divisors is an integer number (17155406016).

Almost surely, 2^204435254023 is an apocalyptic number.

204435254023 is a deficient number, since it is larger than the sum of its proper divisors (70051242233).

204435254023 is a wasteful number, since it uses less digits than its factorization.

204435254023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204231054.

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 204435254023 its reverse (320452534402), we get a palindrome (524887788425).

The spelling of 204435254023 in words is "two hundred four billion, four hundred thirty-five million, two hundred fifty-four thousand, twenty-three".