27189638203 has 16 divisors (see below), whose sum is σ = 33563508160. Its totient is φ = 21448820736.

The previous prime is 27189638183. The next prime is 27189638233. The reversal of 27189638203 is 30283698172.

It is not a de Polignac number, because 27189638203 - 2¹⁷ = 27189507131 is a prime.

It is a super-2 number, since 2×27189638203² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27189638233) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 412638 + ... + 473971.

It is an arithmetic number, because the mean of its divisors is an integer number (2097719260).

Almost surely, 2^27189638203 is an apocalyptic number.

27189638203 is a deficient number, since it is larger than the sum of its proper divisors (6373869957).

27189638203 is a wasteful number, since it uses less digits than its factorization.

27189638203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886966.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 27189638203 in words is "twenty-seven billion, one hundred eighty-nine million, six hundred thirty-eight thousand, two hundred three".