18229547 has 8 divisors (see below), whose sum is σ = 21739776. Its totient is φ = 14945832.

The previous prime is 18229537. The next prime is 18229573. The reversal of 18229547 is 74592281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18229547 - 2¹⁴ = 18213163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18229547.

It is not an unprimeable number, because it can be changed into a prime (18229507) 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 in 7 ways as a sum of consecutive naturals, for example, 56453 + ... + 56774.

It is an arithmetic number, because the mean of its divisors is an integer number (2717472).

Almost surely, 2^18229547 is an apocalyptic number.

18229547 is a deficient number, since it is larger than the sum of its proper divisors (3510229).

18229547 is a wasteful number, since it uses less digits than its factorization.

18229547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113257.

The product of its digits is 40320, while the sum is 38.

The square root of 18229547 is about 4269.6073589968. The cubic root of 18229547 is about 263.1834802303.

The spelling of 18229547 in words is "eighteen million, two hundred twenty-nine thousand, five hundred forty-seven".