109209018 has 16 divisors (see below), whose sum is σ = 219682656. Its totient is φ = 36192240.

The previous prime is 109209007. The next prime is 109209029. The reversal of 109209018 is 810902901.

It is an interprime number because it is at equal distance from previous prime (109209007) and next prime (109209029).

It is a super-2 number, since 2×109209018² = 23853219225048648, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51568 + ... + 53643.

It is an arithmetic number, because the mean of its divisors is an integer number (13730166).

Almost surely, 2^109209018 is an apocalyptic number.

109209018 is an abundant number, since it is smaller than the sum of its proper divisors (110473638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109209018 is a wasteful number, since it uses less digits than its factorization.

109209018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105389.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 109209018 is about 10450.3118613752. The cubic root of 109209018 is about 477.9907592035.

The spelling of 109209018 in words is "one hundred nine million, two hundred nine thousand, eighteen".