18365852988 has 54 divisors (see below), whose sum is σ = 53063124296. Its totient is φ = 5246771904.

The previous prime is 18365852959. The next prime is 18365853013. The reversal of 18365852988 is 88925856381.

18365852988 is a `hidden beast` number, since 18 + 36 + 585 + 2 + 9 + 8 + 8 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2147056 + ... + 2155592.

Almost surely, 2^18365852988 is an apocalyptic number.

18365852988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18365852988 is an abundant number, since it is smaller than the sum of its proper divisors (34697271308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18365852988 is an frugal number, since it uses more digits than its factorization.

18365852988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17091 (or 8549 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

Multiplying 18365852988 by its sum of digits (63), we get a square (1157048738244 = 1075662²).

18365852988 divided by its sum of digits (63) gives a square (291521476 = 17074²).

The spelling of 18365852988 in words is "eighteen billion, three hundred sixty-five million, eight hundred fifty-two thousand, nine hundred eighty-eight".