18339531971712 has 192 divisors, whose sum is σ = 60001148377440. Its totient is φ = 4931638763520.

The previous prime is 18339531971699. The next prime is 18339531971753. The reversal of 18339531971712 is 21717913593381.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28347114 + ... + 28986857.

Almost surely, 2^{18339531971712} is an apocalyptic number.

18339531971712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18339531971712 is an abundant number, since it is smaller than the sum of its proper divisors (41661616405728).

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

18339531971712 is a wasteful number, since it uses less digits than its factorization.

18339531971712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57334019 (or 57334000 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 60.

The spelling of 18339531971712 in words is "eighteen trillion, three hundred thirty-nine billion, five hundred thirty-one million, nine hundred seventy-one thousand, seven hundred twelve".