188852021 has 2 divisors, whose sum is σ = 188852022. Its totient is φ = 188852020.

The previous prime is 188852017. The next prime is 188852023. The reversal of 188852021 is 120258881.

188852021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135722500 + 53129521 = 11650^2 + 7289^2 .

It is a cyclic number.

It is not a de Polignac number, because 188852021 - 2² = 188852017 is a prime.

Together with 188852023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188852023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94426010 + 94426011.

It is an arithmetic number, because the mean of its divisors is an integer number (94426011).

Almost surely, 2^188852021 is an apocalyptic number.

It is an amenable number.

188852021 is a deficient number, since it is larger than the sum of its proper divisors (1).

188852021 is an equidigital number, since it uses as much as digits as its factorization.

188852021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 188852021 is about 13742.3440867997. The cubic root of 188852021 is about 573.7295413111.

The spelling of 188852021 in words is "one hundred eighty-eight million, eight hundred fifty-two thousand, twenty-one".