18683518370505 has 16 divisors (see below), whose sum is σ = 29961109379520. Its totient is φ = 9942049802048.

The previous prime is 18683518370471. The next prime is 18683518370509. The reversal of 18683518370505 is 50507381538681.

It is a cyclic number.

It is not a de Polignac number, because 18683518370505 - 2⁶ = 18683518370441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18683518370509) 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, 1405826190 + ... + 1405839479.

It is an arithmetic number, because the mean of its divisors is an integer number (1872569336220).

Almost surely, 2^{18683518370505} is an apocalyptic number.

18683518370505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18683518370505 is a deficient number, since it is larger than the sum of its proper divisors (11277591009015).

18683518370505 is a wasteful number, since it uses less digits than its factorization.

18683518370505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811666120.

The product of its (nonzero) digits is 24192000, while the sum is 60.

The spelling of 18683518370505 in words is "eighteen trillion, six hundred eighty-three billion, five hundred eighteen million, three hundred seventy thousand, five hundred five".