18534749 has 2 divisors, whose sum is σ = 18534750. Its totient is φ = 18534748.

The previous prime is 18534727. The next prime is 18534751. The reversal of 18534749 is 94743581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 6666724 = 3445^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 18534749 - 2²⁰ = 17486173 is a prime.

Together with 18534751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18534049) 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, 9267374 + 9267375.

It is an arithmetic number, because the mean of its divisors is an integer number (9267375).

Almost surely, 2^18534749 is an apocalyptic number.

It is an amenable number.

18534749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18534749 is an equidigital number, since it uses as much as digits as its factorization.

18534749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 18534749 is about 4305.2002276317. The cubic root of 18534749 is about 264.6441122748.

The spelling of 18534749 in words is "eighteen million, five hundred thirty-four thousand, seven hundred forty-nine".