18644483250 has 48 divisors (see below), whose sum is σ = 50414688792. Its totient is φ = 4971861600.

The previous prime is 18644483239. The next prime is 18644483281. The reversal of 18644483250 is 5238444681.

18644483250 is a `hidden beast` number, since 1 + 86 + 44 + 483 + 2 + 50 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7642780929 + 11001702321 = 87423^2 + 104889^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 18644483196 and 18644483205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4140969 + ... + 4145468.

Almost surely, 2^18644483250 is an apocalyptic number.

18644483250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18644483250 is an abundant number, since it is smaller than the sum of its proper divisors (31770205542).

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

18644483250 is a wasteful number, since it uses less digits than its factorization.

18644483250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286460 (or 8286447 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 18644483250 in words is "eighteen billion, six hundred forty-four million, four hundred eighty-three thousand, two hundred fifty".