18239101 has 2 divisors, whose sum is σ = 18239102. Its totient is φ = 18239100.

The previous prime is 18239099. The next prime is 18239141. The reversal of 18239101 is 10193281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 168100 = 4251^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 18239101 - 2¹ = 18239099 is a prime.

Together with 18239099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18239141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9119550 + 9119551.

It is an arithmetic number, because the mean of its divisors is an integer number (9119551).

Almost surely, 2^18239101 is an apocalyptic number.

It is an amenable number.

18239101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18239101 is an equidigital number, since it uses as much as digits as its factorization.

18239101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 18239101 is about 4270.7260506851. The cubic root of 18239101 is about 263.2294498463.

The spelling of 18239101 in words is "eighteen million, two hundred thirty-nine thousand, one hundred one".