18530634899 has 8 divisors (see below), whose sum is σ = 22423625568. Its totient is φ = 14949083520.

The previous prime is 18530634877. The next prime is 18530634907. The reversal of 18530634899 is 99843603581.

It is a happy number.

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

It is not a de Polignac number, because 18530634899 - 2¹² = 18530630803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18530634799) 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, 77859692 + ... + 77859929.

It is an arithmetic number, because the mean of its divisors is an integer number (2802953196).

Almost surely, 2^18530634899 is an apocalyptic number.

18530634899 is a deficient number, since it is larger than the sum of its proper divisors (3892990669).

18530634899 is a wasteful number, since it uses less digits than its factorization.

18530634899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155719645.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 18530634899 in words is "eighteen billion, five hundred thirty million, six hundred thirty-four thousand, eight hundred ninety-nine".