18485519 has 4 divisors (see below), whose sum is σ = 19907496. Its totient is φ = 17063544.

The previous prime is 18485503. The next prime is 18485531. The reversal of 18485519 is 91558481.

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

It is a cyclic number.

It is not a de Polignac number, because 18485519 - 2⁴ = 18485503 is a prime.

It is a super-2 number, since 2×18485519² = 683428825398722, 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 (18485539) 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, 710969 + ... + 710994.

It is an arithmetic number, because the mean of its divisors is an integer number (4976874).

Almost surely, 2^18485519 is an apocalyptic number.

18485519 is a deficient number, since it is larger than the sum of its proper divisors (1421977).

18485519 is a wasteful number, since it uses less digits than its factorization.

18485519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421976.

The product of its digits is 57600, while the sum is 41.

The square root of 18485519 is about 4299.4789219160. The cubic root of 18485519 is about 264.4095981450.

The spelling of 18485519 in words is "eighteen million, four hundred eighty-five thousand, five hundred nineteen".