18020500344 has 384 divisors, whose sum is σ = 65359457280. Its totient is φ = 4341657600.

The previous prime is 18020500343. The next prime is 18020500357. The reversal of 18020500344 is 44300502081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020500343) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6690262 + ... + 6692954.

It is an arithmetic number, because the mean of its divisors is an integer number (170206920).

Almost surely, 2^18020500344 is an apocalyptic number.

18020500344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18020500344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32679728640).

18020500344 is an abundant number, since it is smaller than the sum of its proper divisors (47338956936).

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

18020500344 is a wasteful number, since it uses less digits than its factorization.

18020500344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 18020500344 in words is "eighteen billion, twenty million, five hundred thousand, three hundred forty-four".