20841265357 has 24 divisors (see below), whose sum is σ = 24039100512. Its totient is φ = 17916832800.

The previous prime is 20841265349. The next prime is 20841265381. The reversal of 20841265357 is 75356214802.

It is not a de Polignac number, because 20841265357 - 2³ = 20841265349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20841260357) 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 23 ways as a sum of consecutive naturals, for example, 2326507 + ... + 2335447.

It is an arithmetic number, because the mean of its divisors is an integer number (1001629188).

Almost surely, 2^20841265357 is an apocalyptic number.

It is an amenable number.

20841265357 is a deficient number, since it is larger than the sum of its proper divisors (3197835155).

20841265357 is a wasteful number, since it uses less digits than its factorization.

20841265357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577 (or 9558 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 20841265357 in words is "twenty billion, eight hundred forty-one million, two hundred sixty-five thousand, three hundred fifty-seven".