20852068049 has 4 divisors (see below), whose sum is σ = 20852381364. Its totient is φ = 20851754736.

The previous prime is 20852068001. The next prime is 20852068057. The reversal of 20852068049 is 94086025802.

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 7544138449 + 13307929600 = 86857^2 + 115360^2 .

It is a cyclic number.

It is not a de Polignac number, because 20852068049 - 2⁸ = 20852067793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20852068079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12782 + ... + 204615.

It is an arithmetic number, because the mean of its divisors is an integer number (5213095341).

Almost surely, 2^20852068049 is an apocalyptic number.

It is an amenable number.

20852068049 is a deficient number, since it is larger than the sum of its proper divisors (313315).

20852068049 is an equidigital number, since it uses as much as digits as its factorization.

20852068049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313314.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 20852068049 in words is "twenty billion, eight hundred fifty-two million, sixty-eight thousand, forty-nine".