18101229 has 4 divisors (see below), whose sum is σ = 24134976. Its totient is φ = 12067484.

The previous prime is 18101227. The next prime is 18101231. The reversal of 18101229 is 92210181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (18101227) and next prime (18101231).

It is a cyclic number.

It is not a de Polignac number, because 18101229 - 2¹ = 18101227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18101199 and 18101208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18101227) 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 in 3 ways as a sum of consecutive naturals, for example, 3016869 + ... + 3016874.

It is an arithmetic number, because the mean of its divisors is an integer number (6033744).

Almost surely, 2^18101229 is an apocalyptic number.

It is an amenable number.

18101229 is a deficient number, since it is larger than the sum of its proper divisors (6033747).

18101229 is an equidigital number, since it uses as much as digits as its factorization.

18101229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033746.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 18101229 is about 4254.5539131618. The cubic root of 18101229 is about 262.5645084090.

The spelling of 18101229 in words is "eighteen million, one hundred one thousand, two hundred twenty-nine".