18995019 has 8 divisors (see below), whose sum is σ = 25346880. Its totient is φ = 12653256.

The previous prime is 18994999. The next prime is 18995021. The reversal of 18995019 is 91059981.

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

It is not a de Polignac number, because 18995019 - 2⁷ = 18994891 is a prime.

It is a super-2 number, since 2×18995019² = 721621493620722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18995059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5664 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (3168360).

Almost surely, 2^18995019 is an apocalyptic number.

18995019 is a deficient number, since it is larger than the sum of its proper divisors (6351861).

18995019 is a wasteful number, since it uses less digits than its factorization.

18995019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5049.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 18995019 is about 4358.3275462039. The cubic root of 18995019 is about 266.8168447489.

The spelling of 18995019 in words is "eighteen million, nine hundred ninety-five thousand, nineteen".