18844885650 has 96 divisors (see below), whose sum is σ = 47608792128. Its totient is φ = 4931942400.

The previous prime is 18844885649. The next prime is 18844885651. The reversal of 18844885650 is 5658844881.

It is an interprime number because it is at equal distance from previous prime (18844885649) and next prime (18844885651).

It is not an unprimeable number, because it can be changed into a prime (18844885651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2820714 + ... + 2827386.

It is an arithmetic number, because the mean of its divisors is an integer number (495924918).

Almost surely, 2^18844885650 is an apocalyptic number.

18844885650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18844885650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23804396064).

18844885650 is an abundant number, since it is smaller than the sum of its proper divisors (28763906478).

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

18844885650 is a wasteful number, since it uses less digits than its factorization.

18844885650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036 (or 7031 counting only the distinct ones).

The product of its (nonzero) digits is 9830400, while the sum is 57.

The spelling of 18844885650 in words is "eighteen billion, eight hundred forty-four million, eight hundred eighty-five thousand, six hundred fifty".