18029331 has 8 divisors (see below), whose sum is σ = 26710160. Its totient is φ = 12019536.

The previous prime is 18029303. The next prime is 18029351. The reversal of 18029331 is 13392081.

It is not a de Polignac number, because 18029331 - 2¹¹ = 18027283 is a prime.

It is a super-2 number, since 2×18029331² = 650113552615122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 667753 = 18029331 / (1 + 8 + 0 + 2 + 9 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18029295 and 18029304.

It is not an unprimeable number, because it can be changed into a prime (18029351) 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 7 ways as a sum of consecutive naturals, for example, 333850 + ... + 333903.

It is an arithmetic number, because the mean of its divisors is an integer number (3338770).

Almost surely, 2^18029331 is an apocalyptic number.

18029331 is a deficient number, since it is larger than the sum of its proper divisors (8680829).

18029331 is an equidigital number, since it uses as much as digits as its factorization.

18029331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667762 (or 667756 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18029331 is about 4246.0959715956. The cubic root of 18029331 is about 262.2164121078.

The spelling of 18029331 in words is "eighteen million, twenty-nine thousand, three hundred thirty-one".