20841265355 has 4 divisors (see below), whose sum is σ = 25009518432. Its totient is φ = 16673012280.

The previous prime is 20841265349. The next prime is 20841265381. The reversal of 20841265355 is 55356214802.

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

It is not a de Polignac number, because 20841265355 - 2⁴ = 20841265339 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2084126531 + ... + 2084126540.

It is an arithmetic number, because the mean of its divisors is an integer number (6252379608).

Almost surely, 2^20841265355 is an apocalyptic number.

20841265355 is a deficient number, since it is larger than the sum of its proper divisors (4168253077).

20841265355 is an equidigital number, since it uses as much as digits as its factorization.

20841265355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168253076.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 20841265355 in words is "twenty billion, eight hundred forty-one million, two hundred sixty-five thousand, three hundred fifty-five".