18269829 has 6 divisors (see below), whose sum is σ = 26389766. Its totient is φ = 12179880.

The previous prime is 18269827. The next prime is 18269833. The reversal of 18269829 is 92896281.

It can be written as a sum of positive squares in only one way, i.e., 16793604 + 1476225 = 4098^2 + 1215^2 .

It is not a de Polignac number, because 18269829 - 2¹ = 18269827 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18269827) 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 5 ways as a sum of consecutive naturals, for example, 1014982 + ... + 1014999.

Almost surely, 2^18269829 is an apocalyptic number.

It is an amenable number.

18269829 is a deficient number, since it is larger than the sum of its proper divisors (8119937).

18269829 is a wasteful number, since it uses less digits than its factorization.

18269829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029987 (or 2029984 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 18269829 is about 4274.3220515071. The cubic root of 18269829 is about 263.3771906159.

The spelling of 18269829 in words is "eighteen million, two hundred sixty-nine thousand, eight hundred twenty-nine".