18234009 has 24 divisors (see below), whose sum is σ = 27967680. Its totient is φ = 11422752.

The previous prime is 18234001. The next prime is 18234017. The reversal of 18234009 is 90043281.

It is an interprime number because it is at equal distance from previous prime (18234001) and next prime (18234017).

It is not a de Polignac number, because 18234009 - 2³ = 18234001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18234001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11467 + ... + 12959.

It is an arithmetic number, because the mean of its divisors is an integer number (1165320).

Almost surely, 2^18234009 is an apocalyptic number.

It is an amenable number.

18234009 is a deficient number, since it is larger than the sum of its proper divisors (9733671).

18234009 is a wasteful number, since it uses less digits than its factorization.

18234009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18234009 is about 4270.1298575102. The cubic root of 18234009 is about 263.2049513963.

It can be divided in two parts, 1823 and 4009, that added together give a cube (5832 = 18³).

The spelling of 18234009 in words is "eighteen million, two hundred thirty-four thousand, nine".