20304343425553 has 16 divisors (see below), whose sum is σ = 22533526498752. Its totient is φ = 18140848992000.

The previous prime is 20304343425539. The next prime is 20304343425581. The reversal of 20304343425553 is 35552434340302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20304343425553 - 2⁵ = 20304343425521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20304343425503) 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, 44766543 + ... + 45217828.

It is an arithmetic number, because the mean of its divisors is an integer number (1408345406172).

Almost surely, 2^{20304343425553} is an apocalyptic number.

It is an amenable number.

20304343425553 is a deficient number, since it is larger than the sum of its proper divisors (2229183073199).

20304343425553 is a wasteful number, since it uses less digits than its factorization.

20304343425553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89984736.

The product of its (nonzero) digits is 2592000, while the sum is 43.

Adding to 20304343425553 its reverse (35552434340302), we get a palindrome (55856777765855).

The spelling of 20304343425553 in words is "twenty trillion, three hundred four billion, three hundred forty-three million, four hundred twenty-five thousand, five hundred fifty-three".