18910451212 has 12 divisors (see below), whose sum is σ = 33987703120. Its totient is φ = 9199678896.

The previous prime is 18910451179. The next prime is 18910451239. The reversal of 18910451212 is 21215401981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63886512 + ... + 63886807.

Almost surely, 2^18910451212 is an apocalyptic number.

It is an amenable number.

18910451212 is a deficient number, since it is larger than the sum of its proper divisors (15077251908).

18910451212 is a wasteful number, since it uses less digits than its factorization.

18910451212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127773360 (or 127773358 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The spelling of 18910451212 in words is "eighteen billion, nine hundred ten million, four hundred fifty-one thousand, two hundred twelve".