20346512611561 has 8 divisors (see below), whose sum is σ = 22677227678880. Its totient is φ = 18141782142528.

The previous prime is 20346512611541. The next prime is 20346512611577. The reversal of 20346512611561 is 16511621564302.

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 20346512611561 - 2¹¹ = 20346512609513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20346512611501) 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, 31496149231 + ... + 31496149876.

It is an arithmetic number, because the mean of its divisors is an integer number (2834653459860).

Almost surely, 2^{20346512611561} is an apocalyptic number.

It is an amenable number.

20346512611561 is a deficient number, since it is larger than the sum of its proper divisors (2330715067319).

20346512611561 is a wasteful number, since it uses less digits than its factorization.

20346512611561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62992299143.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 20346512611561 in words is "twenty trillion, three hundred forty-six billion, five hundred twelve million, six hundred eleven thousand, five hundred sixty-one".