18252709 has 2 divisors, whose sum is σ = 18252710. Its totient is φ = 18252708.

The previous prime is 18252697. The next prime is 18252719. The reversal of 18252709 is 90725281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 4190209 = 3750^2 + 2047^2 .

It is a cyclic number.

It is not a de Polignac number, because 18252709 - 2⁹ = 18252197 is a prime.

It is a super-2 number, since 2×18252709² = 666322771677362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18252719) 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, 9126354 + 9126355.

It is an arithmetic number, because the mean of its divisors is an integer number (9126355).

Almost surely, 2^18252709 is an apocalyptic number.

It is an amenable number.

18252709 is a deficient number, since it is larger than the sum of its proper divisors (1).

18252709 is an equidigital number, since it uses as much as digits as its factorization.

18252709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18252709 is about 4272.3189253613. The cubic root of 18252709 is about 263.2948978068.

The spelling of 18252709 in words is "eighteen million, two hundred fifty-two thousand, seven hundred nine".