20261311765163 has 8 divisors (see below), whose sum is σ = 24517889867232. Its totient is φ = 16345259911296.

The previous prime is 20261311765157. The next prime is 20261311765187. The reversal of 20261311765163 is 36156711316202.

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 20261311765163 - 2⁶ = 20261311765099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20261311765133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 85131561920 + ... + 85131562157.

It is an arithmetic number, because the mean of its divisors is an integer number (3064736233404).

Almost surely, 2^{20261311765163} is an apocalyptic number.

20261311765163 is a deficient number, since it is larger than the sum of its proper divisors (4256578102069).

20261311765163 is a wasteful number, since it uses less digits than its factorization.

20261311765163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170263124101.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 20261311765163 in words is "twenty trillion, two hundred sixty-one billion, three hundred eleven million, seven hundred sixty-five thousand, one hundred sixty-three".