20117621175275 has 12 divisors (see below), whose sum is σ = 26864761816032. Its totient is φ = 14856089483040.

The previous prime is 20117621175209. The next prime is 20117621175313. The reversal of 20117621175275 is 57257112671102.

It is not a de Polignac number, because 20117621175275 - 2¹⁰ = 20117621174251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30950186099 + ... + 30950186748.

It is an arithmetic number, because the mean of its divisors is an integer number (2238730151336).

Almost surely, 2^{20117621175275} is an apocalyptic number.

20117621175275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20117621175275 is a deficient number, since it is larger than the sum of its proper divisors (6747140640757).

20117621175275 is a wasteful number, since it uses less digits than its factorization.

20117621175275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61900372870 (or 61900372865 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 47.

The spelling of 20117621175275 in words is "twenty trillion, one hundred seventeen billion, six hundred twenty-one million, one hundred seventy-five thousand, two hundred seventy-five".