20255243543355 has 32 divisors (see below), whose sum is σ = 34784830845504. Its totient is φ = 10028059324416.

The previous prime is 20255243543299. The next prime is 20255243543357. The reversal of 20255243543355 is 55334534255202.

It is not a de Polignac number, because 20255243543355 - 2¹⁵ = 20255243510587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20255243543357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 544038424 + ... + 544075653.

It is an arithmetic number, because the mean of its divisors is an integer number (1087025963922).

Almost surely, 2^{20255243543355} is an apocalyptic number.

20255243543355 is a deficient number, since it is larger than the sum of its proper divisors (14529587302149).

20255243543355 is a wasteful number, since it uses less digits than its factorization.

20255243543355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088114175.

The product of its (nonzero) digits is 10800000, while the sum is 48.

Adding to 20255243543355 its reverse (55334534255202), we get a palindrome (75589777798557).

The spelling of 20255243543355 in words is "twenty trillion, two hundred fifty-five billion, two hundred forty-three million, five hundred forty-three thousand, three hundred fifty-five".