18587641822 has 16 divisors (see below), whose sum is σ = 29355218640. Its totient is φ = 8802779328.

The previous prime is 18587641801. The next prime is 18587641823. The reversal of 18587641822 is 22814678581.

It is a self number, because there is not a number n which added to its sum of digits gives 18587641822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18587641823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135178 + ... + 235474.

It is an arithmetic number, because the mean of its divisors is an integer number (1834701165).

Almost surely, 2^18587641822 is an apocalyptic number.

18587641822 is a deficient number, since it is larger than the sum of its proper divisors (10767576818).

18587641822 is a wasteful number, since it uses less digits than its factorization.

18587641822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105195.

The product of its digits is 1720320, while the sum is 52.

The spelling of 18587641822 in words is "eighteen billion, five hundred eighty-seven million, six hundred forty-one thousand, eight hundred twenty-two".