189388005108 has 24 divisors (see below), whose sum is σ = 442588370112. Its totient is φ = 63031760064.

The previous prime is 189388005101. The next prime is 189388005109. The reversal of 189388005108 is 801500883981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189388005101) 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, 12188785 + ... + 12204312.

It is an arithmetic number, because the mean of its divisors is an integer number (18441182088).

Almost surely, 2^189388005108 is an apocalyptic number.

It is an amenable number.

189388005108 is an abundant number, since it is smaller than the sum of its proper divisors (253200365004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189388005108 is a wasteful number, since it uses less digits than its factorization.

189388005108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24393751 (or 24393749 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 189388005108 in words is "one hundred eighty-nine billion, three hundred eighty-eight million, five thousand, one hundred eight".