18889403712 has 28 divisors (see below), whose sum is σ = 49978214496. Its totient is φ = 6296467840.

The previous prime is 18889403677. The next prime is 18889403719. The reversal of 18889403712 is 21730498881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18889403719) 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, 49190964 + ... + 49191347.

It is an arithmetic number, because the mean of its divisors is an integer number (1784936232).

Almost surely, 2^18889403712 is an apocalyptic number.

18889403712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18889403712 is an abundant number, since it is smaller than the sum of its proper divisors (31088810784).

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

18889403712 is an equidigital number, since it uses as much as digits as its factorization.

18889403712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98382326 (or 98382316 counting only the distinct ones).

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

The spelling of 18889403712 in words is "eighteen billion, eight hundred eighty-nine million, four hundred three thousand, seven hundred twelve".