20127170243542 has 16 divisors (see below), whose sum is σ = 30900096303120. Its totient is φ = 9827247693312.

The previous prime is 20127170243539. The next prime is 20127170243561. The reversal of 20127170243542 is 24534207172102.

It is a junction number, because it is equal to n+sod(n) for n = 20127170243495 and 20127170243504.

It is a congruent number.

It is an unprimeable number.

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, 27018067 + ... + 27753022.

It is an arithmetic number, because the mean of its divisors is an integer number (1931256018945).

Almost surely, 2^{20127170243542} is an apocalyptic number.

20127170243542 is a deficient number, since it is larger than the sum of its proper divisors (10772926059578).

20127170243542 is a wasteful number, since it uses less digits than its factorization.

20127170243542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54775407.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 20127170243542 in words is "twenty trillion, one hundred twenty-seven billion, one hundred seventy million, two hundred forty-three thousand, five hundred forty-two".