20346111656121 has 16 divisors (see below), whose sum is σ = 27237749166144. Its totient is φ = 13509347314944.

The previous prime is 20346111656099. The next prime is 20346111656173. The reversal of 20346111656121 is 12165611164302.

It is not a de Polignac number, because 20346111656121 - 2²³ = 20346103267513 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20346111656121.

It is not an unprimeable number, because it can be changed into a prime (20346111656821) 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, 8012556 + ... + 10241741.

It is an arithmetic number, because the mean of its divisors is an integer number (1702359322884).

Almost surely, 2^{20346111656121} is an apocalyptic number.

It is an amenable number.

20346111656121 is a deficient number, since it is larger than the sum of its proper divisors (6891637510023).

20346111656121 is a wasteful number, since it uses less digits than its factorization.

20346111656121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18255800.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 20346111656121 in words is "twenty trillion, three hundred forty-six billion, one hundred eleven million, six hundred fifty-six thousand, one hundred twenty-one".