20189127842 has 16 divisors (see below), whose sum is σ = 32615640960. Its totient is φ = 9317363472.

The previous prime is 20189127773. The next prime is 20189127851. The reversal of 20189127842 is 24872198102.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20189127793 and 20189127802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528023 + ... + 564965.

It is an arithmetic number, because the mean of its divisors is an integer number (2038477560).

Almost surely, 2^20189127842 is an apocalyptic number.

20189127842 is a deficient number, since it is larger than the sum of its proper divisors (12426513118).

20189127842 is a wasteful number, since it uses less digits than its factorization.

20189127842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57977.

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 20189127842 in words is "twenty billion, one hundred eighty-nine million, one hundred twenty-seven thousand, eight hundred forty-two".