20355553241 has 4 divisors (see below), whose sum is σ = 21057468900. Its totient is φ = 19653637584.

The previous prime is 20355553223. The next prime is 20355553261. The reversal of 20355553241 is 14235555302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3818622025 + 16536931216 = 61795^2 + 128596^2 .

It is a cyclic number.

It is not a de Polignac number, because 20355553241 - 2²⁶ = 20288444377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355553261) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 350957786 + ... + 350957843.

It is an arithmetic number, because the mean of its divisors is an integer number (5264367225).

Almost surely, 2^20355553241 is an apocalyptic number.

It is an amenable number.

20355553241 is a deficient number, since it is larger than the sum of its proper divisors (701915659).

20355553241 is an equidigital number, since it uses as much as digits as its factorization.

20355553241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701915658.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 20355553241 in words is "twenty billion, three hundred fifty-five million, five hundred fifty-three thousand, two hundred forty-one".