20510066617117 has 8 divisors (see below), whose sum is σ = 25570992146112. Its totient is φ = 15981870091200.

The previous prime is 20510066617069. The next prime is 20510066617237. The reversal of 20510066617117 is 71171666001502.

It is a happy number.

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 20510066617117 - 2²³ = 20510058228509 is a prime.

It is a super-4 number, since 4×20510066617117⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510066617517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133182250684 + ... + 133182250837.

It is an arithmetic number, because the mean of its divisors is an integer number (3196374018264).

Almost surely, 2^{20510066617117} is an apocalyptic number.

It is an amenable number.

20510066617117 is a deficient number, since it is larger than the sum of its proper divisors (5060925528995).

20510066617117 is a wasteful number, since it uses less digits than its factorization.

20510066617117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266364501539.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 20510066617117 in words is "twenty trillion, five hundred ten billion, sixty-six million, six hundred seventeen thousand, one hundred seventeen".