20304001105551 has 12 divisors (see below), whose sum is σ = 29379544665120. Its totient is φ = 13512211628640.

The previous prime is 20304001105541. The next prime is 20304001105571. The reversal of 20304001105551 is 15550110040302.

20304001105551 is a `hidden beast` number, since 2 + 0 + 3 + 0 + 4 + 0 + 0 + 1 + 105 + 551 = 666.

It is not a de Polignac number, because 20304001105551 - 2¹⁷ = 20304000974479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304001105511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1982420295 + ... + 1982430536.

It is an arithmetic number, because the mean of its divisors is an integer number (2448295388760).

Almost surely, 2^{20304001105551} is an apocalyptic number.

20304001105551 is a deficient number, since it is larger than the sum of its proper divisors (9075543559569).

20304001105551 is a wasteful number, since it uses less digits than its factorization.

20304001105551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964851406 (or 3964851403 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 20304001105551 its reverse (15550110040302), we get a palindrome (35854111145853).

The spelling of 20304001105551 in words is "twenty trillion, three hundred four billion, one million, one hundred five thousand, five hundred fifty-one".