18739241 has 2 divisors, whose sum is σ = 18739242. Its totient is φ = 18739240.

The previous prime is 18739223. The next prime is 18739247. The reversal of 18739241 is 14293781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13169641 + 5569600 = 3629^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 18739241 - 2⁶ = 18739177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18739247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9369620 + 9369621.

It is an arithmetic number, because the mean of its divisors is an integer number (9369621).

Almost surely, 2^18739241 is an apocalyptic number.

It is an amenable number.

18739241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18739241 is an equidigital number, since it uses as much as digits as its factorization.

18739241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 18739241 is about 4328.8844983437. The cubic root of 18739241 is about 265.6138186020.

The spelling of 18739241 in words is "eighteen million, seven hundred thirty-nine thousand, two hundred forty-one".