20814502355055 has 24 divisors (see below), whose sum is σ = 36078617388528. Its totient is φ = 11101022802816.

The previous prime is 20814502355047. The next prime is 20814502355077. The reversal of 20814502355055 is 55055320541802.

20814502355055 is a `hidden beast` number, since 2 + 0 + 8 + 1 + 45 + 0 + 2 + 3 + 550 + 55 = 666.

It is not a de Polignac number, because 20814502355055 - 2³ = 20814502355047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20814502355055.

It is a congruent number.

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, 12305644 + ... + 13894526.

It is an arithmetic number, because the mean of its divisors is an integer number (1503275724522).

Almost surely, 2^{20814502355055} is an apocalyptic number.

20814502355055 is a deficient number, since it is larger than the sum of its proper divisors (15264115033473).

20814502355055 is a wasteful number, since it uses less digits than its factorization.

20814502355055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880007 (or 1880004 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

Adding to 20814502355055 its reverse (55055320541802), we get a palindrome (75869822896857).

The spelling of 20814502355055 in words is "twenty trillion, eight hundred fourteen billion, five hundred two million, three hundred fifty-five thousand, fifty-five".