20204452456345 has 8 divisors (see below), whose sum is σ = 24267324226176. Its totient is φ = 16148907779376.

The previous prime is 20204452456343. The next prime is 20204452456387. The reversal of 20204452456345 is 54365425440202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20204452456345 - 2¹ = 20204452456343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20204452456295 and 20204452456304.

It is not an unprimeable number, because it can be changed into a prime (20204452456343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1831767147 + ... + 1831778176.

It is an arithmetic number, because the mean of its divisors is an integer number (3033415528272).

Almost surely, 2^{20204452456345} is an apocalyptic number.

It is an amenable number.

20204452456345 is a deficient number, since it is larger than the sum of its proper divisors (4062871769831).

20204452456345 is a wasteful number, since it uses less digits than its factorization.

20204452456345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663546431.

The product of its (nonzero) digits is 4608000, while the sum is 46.

Adding to 20204452456345 its reverse (54365425440202), we get a palindrome (74569877896547).

The spelling of 20204452456345 in words is "twenty trillion, two hundred four billion, four hundred fifty-two million, four hundred fifty-six thousand, three hundred forty-five".