18461894712 has 32 divisors (see below), whose sum is σ = 46172100480. Its totient is φ = 6151649760.

The previous prime is 18461894669. The next prime is 18461894713. The reversal of 18461894712 is 21749816481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461894713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78964 + ... + 207747.

It is an arithmetic number, because the mean of its divisors is an integer number (1442878140).

Almost surely, 2^18461894712 is an apocalyptic number.

18461894712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18461894712 is an abundant number, since it is smaller than the sum of its proper divisors (27710205768).

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

18461894712 is a wasteful number, since it uses less digits than its factorization.

18461894712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289403 (or 289399 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The spelling of 18461894712 in words is "eighteen billion, four hundred sixty-one million, eight hundred ninety-four thousand, seven hundred twelve".