204020055 has 48 divisors (see below), whose sum is σ = 363613536. Its totient is φ = 105780480.

The previous prime is 204019979. The next prime is 204020153. The reversal of 204020055 is 550020402.

It is not a de Polignac number, because 204020055 - 2⁷ = 204019927 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 (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312109 + ... + 312761.

It is an arithmetic number, because the mean of its divisors is an integer number (7575282).

Almost surely, 2^204020055 is an apocalyptic number.

204020055 is a deficient number, since it is larger than the sum of its proper divisors (159593481).

204020055 is a wasteful number, since it uses less digits than its factorization.

204020055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 204020055 is about 14283.5589052589. The cubic root of 204020055 is about 588.6958217553.

Adding to 204020055 its reverse (550020402), we get a palindrome (754040457).

The spelling of 204020055 in words is "two hundred four million, twenty thousand, fifty-five".