204523432450321 has 16 divisors (see below), whose sum is σ = 205175297433600. Its totient is φ = 203872909635648.

The previous prime is 204523432450297. The next prime is 204523432450327. The reversal of 204523432450321 is 123054234325402.

It is a cyclic number.

It is not a de Polignac number, because 204523432450321 - 2³⁷ = 204385993496849 is a prime.

It is a super-2 number, since 2×204523432450321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204523432450327) 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, 918488220 + ... + 918710866.

It is an arithmetic number, because the mean of its divisors is an integer number (12823456089600).

Almost surely, 2^{204523432450321} is an apocalyptic number.

It is an amenable number.

204523432450321 is a deficient number, since it is larger than the sum of its proper divisors (651864983279).

204523432450321 is a wasteful number, since it uses less digits than its factorization.

204523432450321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225648.

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 204523432450321 its reverse (123054234325402), we get a palindrome (327577666775723).

The spelling of 204523432450321 in words is "two hundred four trillion, five hundred twenty-three billion, four hundred thirty-two million, four hundred fifty thousand, three hundred twenty-one".