20104042143555 has 20 divisors (see below), whose sum is σ = 36038357028432. Its totient is φ = 10722155809680.

The previous prime is 20104042143553. The next prime is 20104042143557. The reversal of 20104042143555 is 55534124040102.

20104042143555 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 40 + 4 + 21 + 43 + 555 = 666.

It is an interprime number because it is at equal distance from previous prime (20104042143553) and next prime (20104042143557).

It is not a de Polignac number, because 20104042143555 - 2¹ = 20104042143553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20104042143553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24819804711 + ... + 24819805520.

Almost surely, 2^{20104042143555} is an apocalyptic number.

20104042143555 is a deficient number, since it is larger than the sum of its proper divisors (15934314884877).

20104042143555 is an equidigital number, since it uses as much as digits as its factorization.

20104042143555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49639610248 (or 49639610239 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 20104042143555 its reverse (55534124040102), we get a palindrome (75638166183657).

The spelling of 20104042143555 in words is "twenty trillion, one hundred four billion, forty-two million, one hundred forty-three thousand, five hundred fifty-five".