18788101 has 2 divisors, whose sum is σ = 18788102. Its totient is φ = 18788100.

The previous prime is 18788089. The next prime is 18788113. The reversal of 18788101 is 10188781.

It is a balanced prime because it is at equal distance from previous prime (18788089) and next prime (18788113).

It can be written as a sum of positive squares in only one way, i.e., 10407076 + 8381025 = 3226^2 + 2895^2 .

It is a cyclic number.

It is not a de Polignac number, because 18788101 - 2⁵ = 18788069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18789101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9394050 + 9394051.

It is an arithmetic number, because the mean of its divisors is an integer number (9394051).

Almost surely, 2^18788101 is an apocalyptic number.

It is an amenable number.

18788101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18788101 is an equidigital number, since it uses as much as digits as its factorization.

18788101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 34.

The square root of 18788101 is about 4334.5243106943. The cubic root of 18788101 is about 265.8444687856.

It can be divided in two parts, 187 and 88101, that added together give a palindrome (88288).

The spelling of 18788101 in words is "eighteen million, seven hundred eighty-eight thousand, one hundred one".