18181040712 has 32 divisors (see below), whose sum is σ = 46310201280. Its totient is φ = 5946000320.

The previous prime is 18181040687. The next prime is 18181040719. The reversal of 18181040712 is 21704018181.

It is not an unprimeable number, because it can be changed into a prime (18181040719) 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, 7145364 + ... + 7147907.

It is an arithmetic number, because the mean of its divisors is an integer number (1447193790).

Almost surely, 2^18181040712 is an apocalyptic number.

18181040712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18181040712 is an abundant number, since it is smaller than the sum of its proper divisors (28129160568).

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

18181040712 is a wasteful number, since it uses less digits than its factorization.

18181040712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14293333 (or 14293329 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 33.

Adding to 18181040712 its reverse (21704018181), we get a palindrome (39885058893).

The spelling of 18181040712 in words is "eighteen billion, one hundred eighty-one million, forty thousand, seven hundred twelve".