18866909116 has 12 divisors (see below), whose sum is σ = 36018644760. Its totient is φ = 8575867760.

The previous prime is 18866909107. The next prime is 18866909129. The reversal of 18866909116 is 61190966881.

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, 214396651 + ... + 214396738.

It is an arithmetic number, because the mean of its divisors is an integer number (3001553730).

Almost surely, 2^18866909116 is an apocalyptic number.

It is an amenable number.

18866909116 is a deficient number, since it is larger than the sum of its proper divisors (17151735644).

18866909116 is a wasteful number, since it uses less digits than its factorization.

18866909116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428793404 (or 428793402 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 18866909116 in words is "eighteen billion, eight hundred sixty-six million, nine hundred nine thousand, one hundred sixteen".