20636852153 has 4 divisors (see below), whose sum is σ = 20657552100. Its totient is φ = 20616152208.

The previous prime is 20636852149. The next prime is 20636852207. The reversal of 20636852153 is 35125863602.

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 15592017424 + 5044834729 = 124868^2 + 71027^2 .

It is a cyclic number.

It is not a de Polignac number, because 20636852153 - 2² = 20636852149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20636852153.

It is not an unprimeable number, because it can be changed into a prime (20636852123) 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, 10348478 + ... + 10350471.

It is an arithmetic number, because the mean of its divisors is an integer number (5164388025).

Almost surely, 2^20636852153 is an apocalyptic number.

It is an amenable number.

20636852153 is a deficient number, since it is larger than the sum of its proper divisors (20699947).

20636852153 is an equidigital number, since it uses as much as digits as its factorization.

20636852153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20699946.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20636852153 in words is "twenty billion, six hundred thirty-six million, eight hundred fifty-two thousand, one hundred fifty-three".