18218789834 has 8 divisors (see below), whose sum is σ = 31232211168. Its totient is φ = 7808052780.

The previous prime is 18218789819. The next prime is 18218789839. The reversal of 18218789834 is 43898781281.

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

It is not an unprimeable number, because it can be changed into a prime (18218789839) 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, 650671052 + ... + 650671079.

It is an arithmetic number, because the mean of its divisors is an integer number (3904026396).

Almost surely, 2^18218789834 is an apocalyptic number.

18218789834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18218789834 is a deficient number, since it is larger than the sum of its proper divisors (13013421334).

18218789834 is a wasteful number, since it uses less digits than its factorization.

18218789834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301342140.

The product of its digits is 6193152, while the sum is 59.

The spelling of 18218789834 in words is "eighteen billion, two hundred eighteen million, seven hundred eighty-nine thousand, eight hundred thirty-four".