188020361 has 8 divisors (see below), whose sum is σ = 192800904. Its totient is φ = 183294720.

The previous prime is 188020321. The next prime is 188020367. The reversal of 188020361 is 163020881.

It can be written as a sum of positive squares in 4 ways, for example, as 27237961 + 160782400 = 5219^2 + 12680^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188020361 - 2⁶ = 188020297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188020367) 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, 6746 + ... + 20531.

It is an arithmetic number, because the mean of its divisors is an integer number (24100113).

Almost surely, 2^188020361 is an apocalyptic number.

It is an amenable number.

188020361 is a deficient number, since it is larger than the sum of its proper divisors (4780543).

188020361 is a wasteful number, since it uses less digits than its factorization.

188020361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27451.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 188020361 is about 13712.0516699727. The cubic root of 188020361 is about 572.8861119032.

The spelling of 188020361 in words is "one hundred eighty-eight million, twenty thousand, three hundred sixty-one".