16204321225 has 24 divisors (see below), whose sum is σ = 20409274080. Its totient is φ = 12760936320.

The previous prime is 16204321207. The next prime is 16204321291. The reversal of 16204321225 is 52212340261.

It is not a de Polignac number, because 16204321225 - 2⁵ = 16204321193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16204321193 and 16204321202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489034 + ... + 521116.

It is an arithmetic number, because the mean of its divisors is an integer number (850386420).

Almost surely, 2^16204321225 is an apocalyptic number.

It is an amenable number.

16204321225 is a deficient number, since it is larger than the sum of its proper divisors (4204952855).

16204321225 is a wasteful number, since it uses less digits than its factorization.

16204321225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32409 (or 32404 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 16204321225 its reverse (52212340261), we get a palindrome (68416661486).

The spelling of 16204321225 in words is "sixteen billion, two hundred four million, three hundred twenty-one thousand, two hundred twenty-five".