18252643 has 2 divisors, whose sum is σ = 18252644. Its totient is φ = 18252642.

The previous prime is 18252607. The next prime is 18252659. The reversal of 18252643 is 34625281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18252643 - 2⁹ = 18252131 is a prime.

It is not a weakly prime, because it can be changed into another prime (18252943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9126321 + 9126322.

It is an arithmetic number, because the mean of its divisors is an integer number (9126322).

Almost surely, 2^18252643 is an apocalyptic number.

18252643 is a deficient number, since it is larger than the sum of its proper divisors (1).

18252643 is an equidigital number, since it uses as much as digits as its factorization.

18252643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 18252643 is about 4272.3112012118. The cubic root of 18252643 is about 263.2945804569.

It can be divided in two parts, 182 and 52643, that added together give a palindrome (52825).

The spelling of 18252643 in words is "eighteen million, two hundred fifty-two thousand, six hundred forty-three".