18942019 has 8 divisors (see below), whose sum is σ = 19284480. Its totient is φ = 18601800.

The previous prime is 18942013. The next prime is 18942073. The reversal of 18942019 is 91024981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18942019 is a prime.

It is a super-2 number, since 2×18942019² = 717600167592722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18942013) 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 7 ways as a sum of consecutive naturals, for example, 30292 + ... + 30910.

It is an arithmetic number, because the mean of its divisors is an integer number (2410560).

Almost surely, 2^18942019 is an apocalyptic number.

18942019 is a deficient number, since it is larger than the sum of its proper divisors (342461).

18942019 is an equidigital number, since it uses as much as digits as its factorization.

18942019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 18942019 is about 4352.2429849447. The cubic root of 18942019 is about 266.5684556745.

The spelling of 18942019 in words is "eighteen million, nine hundred forty-two thousand, nineteen".