188020925 has 6 divisors (see below), whose sum is σ = 233145978. Its totient is φ = 150416720.

The previous prime is 188020913. The next prime is 188020927. The reversal of 188020925 is 529020881.

It can be written as a sum of positive squares in 3 ways, for example, as 24334489 + 163686436 = 4933^2 + 12794^2 .

It is not a de Polignac number, because 188020925 - 2¹⁰ = 188019901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188020927) 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 5 ways as a sum of consecutive naturals, for example, 3760394 + ... + 3760443.

It is an arithmetic number, because the mean of its divisors is an integer number (38857663).

Almost surely, 2^188020925 is an apocalyptic number.

It is an amenable number.

188020925 is a deficient number, since it is larger than the sum of its proper divisors (45125053).

188020925 is an equidigital number, since it uses as much as digits as its factorization.

188020925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7520847 (or 7520842 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 188020925 is about 13712.0722358074. The cubic root of 188020925 is about 572.8866847267.

The spelling of 188020925 in words is "one hundred eighty-eight million, twenty thousand, nine hundred twenty-five".