18617457212 has 12 divisors (see below), whose sum is σ = 32581507056. Its totient is φ = 9308455200.

The previous prime is 18617457193. The next prime is 18617457259. The reversal of 18617457212 is 21275471681.

It is a congruent number.

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, 220337 + ... + 292887.

It is an arithmetic number, because the mean of its divisors is an integer number (2715125588).

Almost surely, 2^18617457212 is an apocalyptic number.

It is an amenable number.

18617457212 is a deficient number, since it is larger than the sum of its proper divisors (13964049844).

18617457212 is a wasteful number, since it uses less digits than its factorization.

18617457212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136708 (or 136706 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The spelling of 18617457212 in words is "eighteen billion, six hundred seventeen million, four hundred fifty-seven thousand, two hundred twelve".