20416140216545 has 16 divisors (see below), whose sum is σ = 25032333411792. Its totient is φ = 15979348070400.

The previous prime is 20416140216539. The next prime is 20416140216547. The reversal of 20416140216545 is 54561204161402.

It can be written as a sum of positive squares in 8 ways, for example, as 117520067344 + 20298620149201 = 342812^2 + 4505399^2 .

It is not a de Polignac number, because 20416140216545 - 2⁴ = 20416140216529 is a prime.

It is a super-2 number, since 2×20416140216545² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20416140216547) 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, 109031156 + ... + 109218245.

It is an arithmetic number, because the mean of its divisors is an integer number (1564520838237).

Almost surely, 2^{20416140216545} is an apocalyptic number.

It is an amenable number.

20416140216545 is a deficient number, since it is larger than the sum of its proper divisors (4616193195247).

20416140216545 is a wasteful number, since it uses less digits than its factorization.

20416140216545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218249812.

The product of its (nonzero) digits is 230400, while the sum is 41.

Adding to 20416140216545 its reverse (54561204161402), we get a palindrome (74977344377947).

The spelling of 20416140216545 in words is "twenty trillion, four hundred sixteen billion, one hundred forty million, two hundred sixteen thousand, five hundred forty-five".