18235897344 has 240 divisors, whose sum is σ = 61620118560. Its totient is φ = 5082808320.

The previous prime is 18235897283. The next prime is 18235897397. The reversal of 18235897344 is 44379853281.

It is a happy number.

18235897344 is a `hidden beast` number, since 1 + 8 + 23 + 589 + 7 + 34 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1315602 + ... + 1329390.

It is an arithmetic number, because the mean of its divisors is an integer number (256750494).

Almost surely, 2^18235897344 is an apocalyptic number.

18235897344 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 18235897344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30810059280).

18235897344 is an abundant number, since it is smaller than the sum of its proper divisors (43384221216).

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

18235897344 is a wasteful number, since it uses less digits than its factorization.

18235897344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13861 (or 13842 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 18235897344 in words is "eighteen billion, two hundred thirty-five million, eight hundred ninety-seven thousand, three hundred forty-four".