18939311058912 has 48 divisors (see below), whose sum is σ = 49717662256080. Its totient is φ = 6312853435392.

The previous prime is 18939311058847. The next prime is 18939311058973. The reversal of 18939311058912 is 21985011393981.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467853 + ... + 6327180.

It is an arithmetic number, because the mean of its divisors is an integer number (1035784630335).

Almost surely, 2^{18939311058912} is an apocalyptic number.

18939311058912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18939311058912 is an abundant number, since it is smaller than the sum of its proper divisors (30778351197168).

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

18939311058912 is a wasteful number, since it uses less digits than its factorization.

18939311058912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7820355 (or 7820347 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 60.

The spelling of 18939311058912 in words is "eighteen trillion, nine hundred thirty-nine billion, three hundred eleven million, fifty-eight thousand, nine hundred twelve".