18643711813606 has 16 divisors (see below), whose sum is σ = 30522854315520. Its totient is φ = 8470258278280.

The previous prime is 18643711813567. The next prime is 18643711813619. The reversal of 18643711813606 is 60631811734681.

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, 207763246 + ... + 207852961.

It is an arithmetic number, because the mean of its divisors is an integer number (1907678394720).

Almost surely, 2^{18643711813606} is an apocalyptic number.

18643711813606 is a deficient number, since it is larger than the sum of its proper divisors (11879142501914).

18643711813606 is a wasteful number, since it uses less digits than its factorization.

18643711813606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415618259.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 18643711813606 in words is "eighteen trillion, six hundred forty-three billion, seven hundred eleven million, eight hundred thirteen thousand, six hundred six".