20620145137361 has 32 divisors (see below), whose sum is σ = 26173646069760. Its totient is φ = 15777380678400.

The previous prime is 20620145137331. The next prime is 20620145137381. The reversal of 20620145137361 is 16373154102602.

It is not a de Polignac number, because 20620145137361 - 2¹⁴ = 20620145120977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20620145137321) 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 31 ways as a sum of consecutive naturals, for example, 1426400 + ... + 6578366.

It is an arithmetic number, because the mean of its divisors is an integer number (817926439680).

Almost surely, 2^{20620145137361} is an apocalyptic number.

It is an amenable number.

20620145137361 is a deficient number, since it is larger than the sum of its proper divisors (5553500932399).

20620145137361 is a wasteful number, since it uses less digits than its factorization.

20620145137361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152925.

The product of its (nonzero) digits is 181440, while the sum is 41.

Adding to 20620145137361 its reverse (16373154102602), we get a palindrome (36993299239963).

The spelling of 20620145137361 in words is "twenty trillion, six hundred twenty billion, one hundred forty-five million, one hundred thirty-seven thousand, three hundred sixty-one".