20606015639953 has 2 divisors, whose sum is σ = 20606015639954. Its totient is φ = 20606015639952.

The previous prime is 20606015639921. The next prime is 20606015640053. The reversal of 20606015639953 is 35993651060602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20358432769024 + 247582870929 = 4512032^2 + 497577^2 .

It is a cyclic number.

It is not a de Polignac number, because 20606015639953 - 2⁵ = 20606015639921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20606015639894 and 20606015639903.

It is not a weakly prime, because it can be changed into another prime (20606015630953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303007819976 + 10303007819977.

It is an arithmetic number, because the mean of its divisors is an integer number (10303007819977).

Almost surely, 2^{20606015639953} is an apocalyptic number.

It is an amenable number.

20606015639953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20606015639953 is an equidigital number, since it uses as much as digits as its factorization.

20606015639953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7873200, while the sum is 55.

The spelling of 20606015639953 in words is "twenty trillion, six hundred six billion, fifteen million, six hundred thirty-nine thousand, nine hundred fifty-three".