188505942003 has 6 divisors (see below), whose sum is σ = 272286360684. Its totient is φ = 125670627996.

The previous prime is 188505941989. The next prime is 188505942007. The reversal of 188505942003 is 300249505881.

188505942003 is a `hidden beast` number, since 1 + 8 + 8 + 50 + 594 + 2 + 0 + 0 + 3 = 666.

It is not a de Polignac number, because 188505942003 - 2⁵ = 188505941971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188505942003.

It is not an unprimeable number, because it can be changed into a prime (188505942007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10472552325 + ... + 10472552342.

It is an arithmetic number, because the mean of its divisors is an integer number (45381060114).

Almost surely, 2^188505942003 is an apocalyptic number.

188505942003 is a deficient number, since it is larger than the sum of its proper divisors (83780418681).

188505942003 is a wasteful number, since it uses less digits than its factorization.

188505942003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20945104673 (or 20945104670 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 188505942003 in words is "one hundred eighty-eight billion, five hundred five million, nine hundred forty-two thousand, three".