18232109 has 16 divisors (see below), whose sum is σ = 22176000. Its totient is φ = 14632704.

The previous prime is 18232079. The next prime is 18232111. The reversal of 18232109 is 90123281.

It is a cyclic number.

It is not a de Polignac number, because 18232109 - 2⁸ = 18231853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41312 + ... + 41750.

It is an arithmetic number, because the mean of its divisors is an integer number (1386000).

Almost surely, 2^18232109 is an apocalyptic number.

It is an amenable number.

18232109 is a deficient number, since it is larger than the sum of its proper divisors (3943891).

18232109 is a wasteful number, since it uses less digits than its factorization.

18232109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18232109 is about 4269.9073760446. The cubic root of 18232109 is about 263.1958090152.

The spelling of 18232109 in words is "eighteen million, two hundred thirty-two thousand, one hundred nine".