18029519 has 4 divisors (see below), whose sum is σ = 18061344. Its totient is φ = 17997696.

The previous prime is 18029491. The next prime is 18029521. The reversal of 18029519 is 91592081.

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-18029519 is a prime.

It is a super-2 number, since 2×18029519² = 650127110742722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18029549) 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, 15047 + ... + 16200.

It is an arithmetic number, because the mean of its divisors is an integer number (4515336).

Almost surely, 2^18029519 is an apocalyptic number.

18029519 is a deficient number, since it is larger than the sum of its proper divisors (31825).

18029519 is an equidigital number, since it uses as much as digits as its factorization.

18029519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31824.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 18029519 is about 4246.1181095207. The cubic root of 18029519 is about 262.2173235211.

The spelling of 18029519 in words is "eighteen million, twenty-nine thousand, five hundred nineteen".