18824229 has 6 divisors (see below), whose sum is σ = 27190566. Its totient is φ = 12549480.

The previous prime is 18824209. The next prime is 18824233. The reversal of 18824229 is 92242881.

It can be written as a sum of positive squares in only one way, i.e., 16793604 + 2030625 = 4098^2 + 1425^2 .

It is not a de Polignac number, because 18824229 - 2⁷ = 18824101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18824193 and 18824202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18824209) 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 5 ways as a sum of consecutive naturals, for example, 1045782 + ... + 1045799.

It is an arithmetic number, because the mean of its divisors is an integer number (4531761).

Almost surely, 2^18824229 is an apocalyptic number.

It is an amenable number.

18824229 is a deficient number, since it is larger than the sum of its proper divisors (8366337).

18824229 is a wasteful number, since it uses less digits than its factorization.

18824229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091587 (or 2091584 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18824229 is about 4338.6897791845. The cubic root of 18824229 is about 266.0147588246.

The spelling of 18824229 in words is "eighteen million, eight hundred twenty-four thousand, two hundred twenty-nine".