18840647366 has 16 divisors (see below), whose sum is σ = 28560759360. Its totient is φ = 9320451840.

The previous prime is 18840647351. The next prime is 18840647381. The reversal of 18840647366 is 66374604881.

It is an interprime number because it is at equal distance from previous prime (18840647351) and next prime (18840647381).

It is a congruent number.

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, 747896 + ... + 772676.

It is an arithmetic number, because the mean of its divisors is an integer number (1785047460).

Almost surely, 2^18840647366 is an apocalyptic number.

18840647366 is a deficient number, since it is larger than the sum of its proper divisors (9720111994).

18840647366 is a wasteful number, since it uses less digits than its factorization.

18840647366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28799.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 18840647366 in words is "eighteen billion, eight hundred forty million, six hundred forty-seven thousand, three hundred sixty-six".