18681910460 has 24 divisors (see below), whose sum is σ = 39417954576. Its totient is φ = 7437346560.

The previous prime is 18681910451. The next prime is 18681910477. The reversal of 18681910460 is 6401918681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2209277 + ... + 2217716.

It is an arithmetic number, because the mean of its divisors is an integer number (1642414774).

Almost surely, 2^18681910460 is an apocalyptic number.

18681910460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18681910460 is an abundant number, since it is smaller than the sum of its proper divisors (20736044116).

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

18681910460 is a wasteful number, since it uses less digits than its factorization.

18681910460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427213 (or 4427211 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 18681910460 in words is "eighteen billion, six hundred eighty-one million, nine hundred ten thousand, four hundred sixty".