1020204525055 has 4 divisors (see below), whose sum is σ = 1224245430072. Its totient is φ = 816163620040.

The previous prime is 1020204525029. The next prime is 1020204525083. The reversal of 1020204525055 is 5505254020201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1020204525055 - 2²⁷ = 1020070307327 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102020452501 + ... + 102020452510.

It is an arithmetic number, because the mean of its divisors is an integer number (306061357518).

Almost surely, 2^{1020204525055} is an apocalyptic number.

1020204525055 is a deficient number, since it is larger than the sum of its proper divisors (204040905017).

1020204525055 is an equidigital number, since it uses as much as digits as its factorization.

1020204525055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204040905016.

The product of its (nonzero) digits is 20000, while the sum is 31.

Adding to 1020204525055 its reverse (5505254020201), we get a palindrome (6525458545256).

The spelling of 1020204525055 in words is "one trillion, twenty billion, two hundred four million, five hundred twenty-five thousand, fifty-five".