18519059 has 8 divisors (see below), whose sum is σ = 20587392. Its totient is φ = 16542720.

The previous prime is 18519049. The next prime is 18519107. The reversal of 18519059 is 95091581.

18519059 = 670² + 671² + ... + 708².

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18519059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18519019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22574 + ... + 23379.

It is an arithmetic number, because the mean of its divisors is an integer number (2573424).

Almost surely, 2^18519059 is an apocalyptic number.

18519059 is a deficient number, since it is larger than the sum of its proper divisors (2068333).

18519059 is a wasteful number, since it uses less digits than its factorization.

18519059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45997.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 18519059 is about 4303.3776269345. The cubic root of 18519059 is about 264.5694158523.

The spelling of 18519059 in words is "eighteen million, five hundred nineteen thousand, fifty-nine".