18058972519 has 4 divisors (see below), whose sum is σ = 20638825744. Its totient is φ = 15479119296.

The previous prime is 18058972513. The next prime is 18058972553. The reversal of 18058972519 is 91527985081.

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 18058972519 - 2³ = 18058972511 is a prime.

It is a super-2 number, since 2×18058972519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18058972519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18058972511) 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, 1289926602 + ... + 1289926615.

It is an arithmetic number, because the mean of its divisors is an integer number (5159706436).

Almost surely, 2^18058972519 is an apocalyptic number.

18058972519 is a deficient number, since it is larger than the sum of its proper divisors (2579853225).

18058972519 is an equidigital number, since it uses as much as digits as its factorization.

18058972519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579853224.

The product of its (nonzero) digits is 1814400, while the sum is 55.

The spelling of 18058972519 in words is "eighteen billion, fifty-eight million, nine hundred seventy-two thousand, five hundred nineteen".