18683518350187 has 4 divisors (see below), whose sum is σ = 18778358545056. Its totient is φ = 18588678155320.

The previous prime is 18683518350163. The next prime is 18683518350221. The reversal of 18683518350187 is 78105381538681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18683518350187 - 2³¹ = 18681370866539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18683518350157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47420097139 + ... + 47420097532.

It is an arithmetic number, because the mean of its divisors is an integer number (4694589636264).

Almost surely, 2^{18683518350187} is an apocalyptic number.

18683518350187 is a deficient number, since it is larger than the sum of its proper divisors (94840194869).

18683518350187 is an equidigital number, since it uses as much as digits as its factorization.

18683518350187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94840194868.

The product of its (nonzero) digits is 38707200, while the sum is 64.

The spelling of 18683518350187 in words is "eighteen trillion, six hundred eighty-three billion, five hundred eighteen million, three hundred fifty thousand, one hundred eighty-seven".