18864229 has 8 divisors (see below), whose sum is σ = 19379360. Its totient is φ = 18352656.

The previous prime is 18864221. The next prime is 18864253. The reversal of 18864229 is 92246881.

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 18864229 - 2³ = 18864221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18864191 and 18864200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18864221) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12487 + ... + 13915.

It is an arithmetic number, because the mean of its divisors is an integer number (2422420).

Almost surely, 2^18864229 is an apocalyptic number.

It is an amenable number.

18864229 is a deficient number, since it is larger than the sum of its proper divisors (515131).

18864229 is a wasteful number, since it uses less digits than its factorization.

18864229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779.

The product of its digits is 55296, while the sum is 40.

The square root of 18864229 is about 4343.2970195463. The cubic root of 18864229 is about 266.2030456407.

The spelling of 18864229 in words is "eighteen million, eight hundred sixty-four thousand, two hundred twenty-nine".