18119929 has 4 divisors (see below), whose sum is σ = 18907776. Its totient is φ = 17332084.

The previous prime is 18119921. The next prime is 18119963. The reversal of 18119929 is 92991181.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92991181 = 103 ⋅902827.

It is a cyclic number.

It is not a de Polignac number, because 18119929 - 2³ = 18119921 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18119891 and 18119900.

It is not an unprimeable number, because it can be changed into a prime (18119921) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393889 + ... + 393934.

It is an arithmetic number, because the mean of its divisors is an integer number (4726944).

Almost surely, 2^18119929 is an apocalyptic number.

It is an amenable number.

18119929 is a deficient number, since it is larger than the sum of its proper divisors (787847).

18119929 is an equidigital number, since it uses as much as digits as its factorization.

18119929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787846.

The product of its digits is 11664, while the sum is 40.

The square root of 18119929 is about 4256.7509910729. The cubic root of 18119929 is about 262.6548939198.

The spelling of 18119929 in words is "eighteen million, one hundred nineteen thousand, nine hundred twenty-nine".