20005555455 has 12 divisors (see below), whose sum is σ = 34676296200. Its totient is φ = 10669629552.

The previous prime is 20005555439. The next prime is 20005555501. The reversal of 20005555455 is 55455550002.

20005555455 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 55 + 554 + 55 = 666.

It is not a de Polignac number, because 20005555455 - 2⁴ = 20005555439 is a prime.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 222283905 + ... + 222283994.

It is an arithmetic number, because the mean of its divisors is an integer number (2889691350).

Almost surely, 2^20005555455 is an apocalyptic number.

20005555455 is a deficient number, since it is larger than the sum of its proper divisors (14670740745).

20005555455 is a wasteful number, since it uses less digits than its factorization.

20005555455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444567910 (or 444567907 counting only the distinct ones).

The product of its (nonzero) digits is 125000, while the sum is 36.

The spelling of 20005555455 in words is "twenty billion, five million, five hundred fifty-five thousand, four hundred fifty-five".