20346512511609 has 24 divisors (see below), whose sum is σ = 31301630651200. Its totient is φ = 13197737839536.

The previous prime is 20346512511557. The next prime is 20346512511617. The reversal of 20346512511609 is 90611521564302.

It is a happy number.

20346512511609 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 6 + 5 + 1 + 25 + 11 + 609 = 666.

It is not a de Polignac number, because 20346512511609 - 2²¹ = 20346510414457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20346512511629) 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 23 ways as a sum of consecutive naturals, for example, 1131484309 + ... + 1131502290.

Almost surely, 2^{20346512511609} is an apocalyptic number.

It is an amenable number.

20346512511609 is a deficient number, since it is larger than the sum of its proper divisors (10955118139591).

20346512511609 is an equidigital number, since it uses as much as digits as its factorization.

20346512511609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262986651 (or 2262986639 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 20346512511609 in words is "twenty trillion, three hundred forty-six billion, five hundred twelve million, five hundred eleven thousand, six hundred nine".