18343019 has 8 divisors (see below), whose sum is σ = 18800640. Its totient is φ = 17888296.

The previous prime is 18343007. The next prime is 18343033. The reversal of 18343019 is 91034381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18343019 - 2⁸ = 18342763 is a prime.

It is a super-2 number, since 2×18343019² = 672932692068722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18342982 and 18343000.

It is not an unprimeable number, because it can be changed into a prime (18343049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17492 + ... + 18510.

It is an arithmetic number, because the mean of its divisors is an integer number (2350080).

Almost surely, 2^18343019 is an apocalyptic number.

18343019 is a deficient number, since it is larger than the sum of its proper divisors (457621).

18343019 is a wasteful number, since it uses less digits than its factorization.

18343019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18343019 is about 4282.8750857339. The cubic root of 18343019 is about 263.7284234725.

The spelling of 18343019 in words is "eighteen million, three hundred forty-three thousand, nineteen".