18129989346 has 64 divisors (see below), whose sum is σ = 42799742976. Its totient is φ = 5010206400.

The previous prime is 18129989341. The next prime is 18129989357. The reversal of 18129989346 is 64398992181.

It is a self number, because there is not a number n which added to its sum of digits gives 18129989346.

It is not an unprimeable number, because it can be changed into a prime (18129989341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4506816 + ... + 4510836.

It is an arithmetic number, because the mean of its divisors is an integer number (668745984).

Almost surely, 2^18129989346 is an apocalyptic number.

18129989346 is an abundant number, since it is smaller than the sum of its proper divisors (24669753630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18129989346 is a wasteful number, since it uses less digits than its factorization.

18129989346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7527.

The product of its digits is 6718464, while the sum is 60.

The spelling of 18129989346 in words is "eighteen billion, one hundred twenty-nine million, nine hundred eighty-nine thousand, three hundred forty-six".