20036547517 has 6 divisors (see below), whose sum is σ = 23307820638. Its totient is φ = 17174183544.

The previous prime is 20036547493. The next prime is 20036547541. The reversal of 20036547517 is 71574563002.

It is an interprime number because it is at equal distance from previous prime (20036547493) and next prime (20036547541).

It can be written as a sum of positive squares in only one way, i.e., 15294021561 + 4742525956 = 123669^2 + 68866^2 .

It is not a de Polignac number, because 20036547517 - 2¹⁵ = 20036514749 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 20036547517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20036547317) 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 5 ways as a sum of consecutive naturals, for example, 204454518 + ... + 204454615.

It is an arithmetic number, because the mean of its divisors is an integer number (3884636773).

Almost surely, 2^20036547517 is an apocalyptic number.

It is an amenable number.

20036547517 is a deficient number, since it is larger than the sum of its proper divisors (3271273121).

20036547517 is an equidigital number, since it uses as much as digits as its factorization.

20036547517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408909147 (or 408909140 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 20036547517 in words is "twenty billion, thirty-six million, five hundred forty-seven thousand, five hundred seventeen".