18819069 has 4 divisors (see below), whose sum is σ = 25092096. Its totient is φ = 12546044.

The previous prime is 18819061. The next prime is 18819107. The reversal of 18819069 is 96091881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18819069 - 2³ = 18819061 is a prime.

It is a super-2 number, since 2×18819069² = 708314716053522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18819069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18819061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3136509 + ... + 3136514.

It is an arithmetic number, because the mean of its divisors is an integer number (6273024).

Almost surely, 2^18819069 is an apocalyptic number.

It is an amenable number.

18819069 is a deficient number, since it is larger than the sum of its proper divisors (6273027).

18819069 is an equidigital number, since it uses as much as digits as its factorization.

18819069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273026.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 18819069 is about 4338.0950888610. The cubic root of 18819069 is about 265.9904504081.

The spelling of 18819069 in words is "eighteen million, eight hundred nineteen thousand, sixty-nine".