204122453290 has 32 divisors (see below), whose sum is σ = 419958120960. Its totient is φ = 69976662144.

The previous prime is 204122453243. The next prime is 204122453321. The reversal of 204122453290 is 92354221402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448806 + ... + 780814.

It is an arithmetic number, because the mean of its divisors is an integer number (13123691280).

Almost surely, 2^204122453290 is an apocalyptic number.

204122453290 is an abundant number, since it is smaller than the sum of its proper divisors (215835667670).

204122453290 is a wasteful number, since it uses less digits than its factorization.

204122453290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340806.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 204122453290 its reverse (92354221402), we get a palindrome (296476674692).

The spelling of 204122453290 in words is "two hundred four billion, one hundred twenty-two million, four hundred fifty-three thousand, two hundred ninety".