20415325165 has 8 divisors (see below), whose sum is σ = 25160509080. Its totient is φ = 15890847552.

The previous prime is 20415325087. The next prime is 20415325169. The reversal of 20415325165 is 56152351402.

It can be written as a sum of positive squares in 4 ways, for example, as 4698691209 + 15716633956 = 68547^2 + 125366^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20415325165 - 2²⁵ = 20381770733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20415325165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415325169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55176370 + ... + 55176739.

It is an arithmetic number, because the mean of its divisors is an integer number (3145063635).

Almost surely, 2^20415325165 is an apocalyptic number.

It is an amenable number.

20415325165 is a deficient number, since it is larger than the sum of its proper divisors (4745183915).

20415325165 is a wasteful number, since it uses less digits than its factorization.

20415325165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110353151.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 20415325165 its reverse (56152351402), we get a palindrome (76567676567).

The spelling of 20415325165 in words is "twenty billion, four hundred fifteen million, three hundred twenty-five thousand, one hundred sixty-five".