18245501 has 2 divisors, whose sum is σ = 18245502. Its totient is φ = 18245500.

The previous prime is 18245489. The next prime is 18245503. The reversal of 18245501 is 10554281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 6002500 = 3499^2 + 2450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18245501 is a prime.

Together with 18245503, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18245503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9122750 + 9122751.

It is an arithmetic number, because the mean of its divisors is an integer number (9122751).

Almost surely, 2^18245501 is an apocalyptic number.

It is an amenable number.

18245501 is a deficient number, since it is larger than the sum of its proper divisors (1).

18245501 is an equidigital number, since it uses as much as digits as its factorization.

18245501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 18245501 is about 4271.4752720811. The cubic root of 18245501 is about 263.2602348335.

Adding to 18245501 its reverse (10554281), we get a palindrome (28799782).

The spelling of 18245501 in words is "eighteen million, two hundred forty-five thousand, five hundred one".