18210833844 has 24 divisors (see below), whose sum is σ = 48562223808. Its totient is φ = 5203095360.

The previous prime is 18210833833. The next prime is 18210833933. The reversal of 18210833844 is 44833801281.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18210833796 and 18210833805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108397737 + ... + 108397904.

It is an arithmetic number, because the mean of its divisors is an integer number (2023425992).

Almost surely, 2^18210833844 is an apocalyptic number.

18210833844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18210833844 is an abundant number, since it is smaller than the sum of its proper divisors (30351389964).

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

18210833844 is a wasteful number, since it uses less digits than its factorization.

18210833844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216795655 (or 216795653 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 18210833844 in words is "eighteen billion, two hundred ten million, eight hundred thirty-three thousand, eight hundred forty-four".