18236741 has 2 divisors, whose sum is σ = 18236742. Its totient is φ = 18236740.

The previous prime is 18236719. The next prime is 18236749. The reversal of 18236741 is 14763281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17048641 + 1188100 = 4129^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 18236741 - 2¹⁴ = 18220357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18236698 and 18236707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18236749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9118370 + 9118371.

It is an arithmetic number, because the mean of its divisors is an integer number (9118371).

Almost surely, 2^18236741 is an apocalyptic number.

It is an amenable number.

18236741 is a deficient number, since it is larger than the sum of its proper divisors (1).

18236741 is an equidigital number, since it uses as much as digits as its factorization.

18236741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 18236741 is about 4270.4497421232. The cubic root of 18236741 is about 263.2180960649.

The spelling of 18236741 in words is "eighteen million, two hundred thirty-six thousand, seven hundred forty-one".