20410516250197 has 16 divisors (see below), whose sum is σ = 21183726038832. Its totient is φ = 19651583508480.

The previous prime is 20410516250183. The next prime is 20410516250213. The reversal of 20410516250197 is 79105261501402.

It can be written as a sum of positive squares in 8 ways, for example, as 2222457805681 + 18188058444516 = 1490791^2 + 4264746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20410516250197 is a prime.

It is a super-3 number, since 3×20410516250197³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20410516250107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5865438 + ... + 8673199.

It is an arithmetic number, because the mean of its divisors is an integer number (1323982877427).

Almost surely, 2^{20410516250197} is an apocalyptic number.

It is an amenable number.

20410516250197 is a deficient number, since it is larger than the sum of its proper divisors (773209788635).

20410516250197 is a wasteful number, since it uses less digits than its factorization.

20410516250197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14539128.

The product of its (nonzero) digits is 151200, while the sum is 43.

Adding to 20410516250197 its reverse (79105261501402), we get a palindrome (99515777751599).

The spelling of 20410516250197 in words is "twenty trillion, four hundred ten billion, five hundred sixteen million, two hundred fifty thousand, one hundred ninety-seven".