20117511366755 has 16 divisors (see below), whose sum is σ = 26340258206304. Its totient is φ = 14628357934080.

The previous prime is 20117511366713. The next prime is 20117511366767. The reversal of 20117511366755 is 55766311571102.

It is a happy number.

It is not a de Polignac number, because 20117511366755 - 2¹² = 20117511362659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31675502 + ... + 32304371.

It is an arithmetic number, because the mean of its divisors is an integer number (1646266137894).

Almost surely, 2^{20117511366755} is an apocalyptic number.

20117511366755 is a deficient number, since it is larger than the sum of its proper divisors (6222746839549).

20117511366755 is a wasteful number, since it uses less digits than its factorization.

20117511366755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63985606.

The product of its (nonzero) digits is 1323000, while the sum is 50.

The spelling of 20117511366755 in words is "twenty trillion, one hundred seventeen billion, five hundred eleven million, three hundred sixty-six thousand, seven hundred fifty-five".