18908229 has 8 divisors (see below), whose sum is σ = 25242400. Its totient is φ = 12589776.

The previous prime is 18908167. The next prime is 18908237. The reversal of 18908229 is 92280981.

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

It is not a de Polignac number, because 18908229 - 2¹⁶ = 18842693 is a prime.

It is a super-2 number, since 2×18908229² = 715042247832882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18908269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (3155300).

Almost surely, 2^18908229 is an apocalyptic number.

It is an amenable number.

18908229 is a deficient number, since it is larger than the sum of its proper divisors (6334171).

18908229 is an equidigital number, since it uses as much as digits as its factorization.

18908229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7859.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18908229 is about 4348.3593457763. The cubic root of 18908229 is about 266.4098539718.

The spelling of 18908229 in words is "eighteen million, nine hundred eight thousand, two hundred twenty-nine".