16138019 has 4 divisors (see below), whose sum is σ = 16839696. Its totient is φ = 15436344.

The previous prime is 16138013. The next prime is 16138027. The reversal of 16138019 is 91083161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16138019 is a prime.

It is a super-2 number, since 2×16138019² = 520871314488722, 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 = 16137982 and 16138000.

It is not an unprimeable number, because it can be changed into a prime (16138013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350804 + ... + 350849.

It is an arithmetic number, because the mean of its divisors is an integer number (4209924).

Almost surely, 2^16138019 is an apocalyptic number.

16138019 is a deficient number, since it is larger than the sum of its proper divisors (701677).

16138019 is an equidigital number, since it uses as much as digits as its factorization.

16138019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701676.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 16138019 is about 4017.2153290557. The cubic root of 16138019 is about 252.7066908730.

The spelling of 16138019 in words is "sixteen million, one hundred thirty-eight thousand, nineteen".