188520997233 has 4 divisors (see below), whose sum is σ = 251361329648. Its totient is φ = 125680664820.

The previous prime is 188520997199. The next prime is 188520997237. The reversal of 188520997233 is 332799025881.

It is a happy number.

188520997233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 188520997233 - 2⁶ = 188520997169 is a prime.

It is a super-3 number, since 3×188520997233³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188520997237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31420166203 + ... + 31420166208.

It is an arithmetic number, because the mean of its divisors is an integer number (62840332412).

Almost surely, 2^188520997233 is an apocalyptic number.

It is an amenable number.

188520997233 is a deficient number, since it is larger than the sum of its proper divisors (62840332415).

188520997233 is an equidigital number, since it uses as much as digits as its factorization.

188520997233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62840332414.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 188520997233 in words is "one hundred eighty-eight billion, five hundred twenty million, nine hundred ninety-seven thousand, two hundred thirty-three".