18219075 has 24 divisors (see below), whose sum is σ = 34426368. Its totient is φ = 8328480.

The previous prime is 18219037. The next prime is 18219077. The reversal of 18219075 is 57091281.

It is not a de Polignac number, because 18219075 - 2⁷ = 18218947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18219077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16827 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (1434432).

Almost surely, 2^18219075 is an apocalyptic number.

18219075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18219075 is a deficient number, since it is larger than the sum of its proper divisors (16207293).

18219075 is a wasteful number, since it uses less digits than its factorization.

18219075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34723 (or 34718 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 18219075 is about 4268.3808405530. The cubic root of 18219075 is about 263.1330751505.

The spelling of 18219075 in words is "eighteen million, two hundred nineteen thousand, seventy-five".