20117811303511 has 24 divisors (see below), whose sum is σ = 21685326006960. Its totient is φ = 18656603489664.

The previous prime is 20117811303503. The next prime is 20117811303533. The reversal of 20117811303511 is 11530311871102.

It is not a de Polignac number, because 20117811303511 - 2³ = 20117811303503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117811300511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186051 + ... + 6345883.

It is an arithmetic number, because the mean of its divisors is an integer number (903555250290).

Almost surely, 2^{20117811303511} is an apocalyptic number.

20117811303511 is a deficient number, since it is larger than the sum of its proper divisors (1567514703449).

20117811303511 is a wasteful number, since it uses less digits than its factorization.

20117811303511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160063 (or 6160044 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 34.

The spelling of 20117811303511 in words is "twenty trillion, one hundred seventeen billion, eight hundred eleven million, three hundred three thousand, five hundred eleven".