18214917287 has 16 divisors (see below), whose sum is σ = 21617283072. Its totient is φ = 15018644160.

The previous prime is 18214917251. The next prime is 18214917289. The reversal of 18214917287 is 78271941281.

It is a cyclic number.

It is not a de Polignac number, because 18214917287 - 2¹² = 18214913191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18214917289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215078 + ... + 287555.

It is an arithmetic number, because the mean of its divisors is an integer number (1351080192).

Almost surely, 2^18214917287 is an apocalyptic number.

18214917287 is a deficient number, since it is larger than the sum of its proper divisors (3402365785).

18214917287 is a wasteful number, since it uses less digits than its factorization.

18214917287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502838.

The product of its digits is 451584, while the sum is 50.

The spelling of 18214917287 in words is "eighteen billion, two hundred fourteen million, nine hundred seventeen thousand, two hundred eighty-seven".