18144551 has 2 divisors, whose sum is σ = 18144552. Its totient is φ = 18144550.

The previous prime is 18144527. The next prime is 18144557. The reversal of 18144551 is 15544181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18144551 - 2¹⁴ = 18128167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18144557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072275 + 9072276.

It is an arithmetic number, because the mean of its divisors is an integer number (9072276).

Almost surely, 2^18144551 is an apocalyptic number.

18144551 is a deficient number, since it is larger than the sum of its proper divisors (1).

18144551 is an equidigital number, since it uses as much as digits as its factorization.

18144551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 29.

The square root of 18144551 is about 4259.6421211177. The cubic root of 18144551 is about 262.7738083256.

The spelling of 18144551 in words is "eighteen million, one hundred forty-four thousand, five hundred fifty-one".