18481909211212 has 24 divisors (see below), whose sum is σ = 34100623323200. Its totient is φ = 8740445435856.

The previous prime is 18481909211197. The next prime is 18481909211221. The reversal of 18481909211212 is 21211290918481.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196385118 + ... + 196479205.

Almost surely, 2^{18481909211212} is an apocalyptic number.

It is an amenable number.

18481909211212 is a deficient number, since it is larger than the sum of its proper divisors (15618714111988).

18481909211212 is a wasteful number, since it uses less digits than its factorization.

18481909211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392864965 (or 392864963 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 49.

The spelling of 18481909211212 in words is "eighteen trillion, four hundred eighty-one billion, nine hundred nine million, two hundred eleven thousand, two hundred twelve".