20155035555 has 48 divisors (see below), whose sum is σ = 37021140000. Its totient is φ = 10115186688.

The previous prime is 20155035533. The next prime is 20155035599. The reversal of 20155035555 is 55553055102.

20155035555 is a `hidden beast` number, since 2 + 0 + 1 + 550 + 3 + 55 + 55 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20155035555 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48291 + ... + 206499.

It is an arithmetic number, because the mean of its divisors is an integer number (771273750).

Almost surely, 2^20155035555 is an apocalyptic number.

20155035555 is a deficient number, since it is larger than the sum of its proper divisors (16866104445).

20155035555 is a wasteful number, since it uses less digits than its factorization.

20155035555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158388 (or 158385 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 36.

The spelling of 20155035555 in words is "twenty billion, one hundred fifty-five million, thirty-five thousand, five hundred fifty-five".