18242701 has 2 divisors, whose sum is σ = 18242702. Its totient is φ = 18242700.

The previous prime is 18242699. The next prime is 18242713. The reversal of 18242701 is 10724281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18232900 + 9801 = 4270^2 + 99^2 .

It is a cyclic number.

It is not a de Polignac number, because 18242701 - 2¹ = 18242699 is a prime.

It is a super-2 number, since 2×18242701² = 665592279550802, which contains 22 as substring.

Together with 18242699, 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 (18242771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9121350 + 9121351.

It is an arithmetic number, because the mean of its divisors is an integer number (9121351).

Almost surely, 2^18242701 is an apocalyptic number.

It is an amenable number.

18242701 is a deficient number, since it is larger than the sum of its proper divisors (1).

18242701 is an equidigital number, since it uses as much as digits as its factorization.

18242701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18242701 is about 4271.1475038917. The cubic root of 18242701 is about 263.2467672875.

Adding to 18242701 its reverse (10724281), we get a palindrome (28966982).

The spelling of 18242701 in words is "eighteen million, two hundred forty-two thousand, seven hundred one".