18053519 has 4 divisors (see below), whose sum is σ = 19694760. Its totient is φ = 16412280.

The previous prime is 18053513. The next prime is 18053533. The reversal of 18053519 is 91535081.

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 18053519 - 2⁸ = 18053263 is a prime.

It is a super-2 number, since 2×18053519² = 651859096566722, 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 (18053513) 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, 820604 + ... + 820625.

It is an arithmetic number, because the mean of its divisors is an integer number (4923690).

Almost surely, 2^18053519 is an apocalyptic number.

18053519 is a deficient number, since it is larger than the sum of its proper divisors (1641241).

18053519 is a wasteful number, since it uses less digits than its factorization.

18053519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641240.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 18053519 is about 4248.9432803934. The cubic root of 18053519 is about 262.3336221574. Note that the first 3 decimals are identical.

The spelling of 18053519 in words is "eighteen million, fifty-three thousand, five hundred nineteen".