20106170017147 has 4 divisors (see below), whose sum is σ = 20106312098400. Its totient is φ = 20106027935896.

The previous prime is 20106170017121. The next prime is 20106170017187. The reversal of 20106170017147 is 74171007160102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20106170017147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20106170017187) 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 3 ways as a sum of consecutive naturals, for example, 70828147 + ... + 71111452.

It is an arithmetic number, because the mean of its divisors is an integer number (5026578024600).

Almost surely, 2^{20106170017147} is an apocalyptic number.

20106170017147 is a deficient number, since it is larger than the sum of its proper divisors (142081253).

20106170017147 is a wasteful number, since it uses less digits than its factorization.

20106170017147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142081252.

The product of its (nonzero) digits is 16464, while the sum is 37.

Adding to 20106170017147 its reverse (74171007160102), we get a palindrome (94277177177249).

The spelling of 20106170017147 in words is "twenty trillion, one hundred six billion, one hundred seventy million, seventeen thousand, one hundred forty-seven".