18234617808 has 160 divisors (see below), whose sum is σ = 51910963200. Its totient is φ = 5469811200.

The previous prime is 18234617801. The next prime is 18234617827. The reversal of 18234617808 is 80871643281.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234617801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28897653 + ... + 28898283.

It is an arithmetic number, because the mean of its divisors is an integer number (324443520).

Almost surely, 2^18234617808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18234617808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25955481600).

18234617808 is an abundant number, since it is smaller than the sum of its proper divisors (33676345392).

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

18234617808 is a wasteful number, since it uses less digits than its factorization.

18234617808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1115 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 18234617808 in words is "eighteen billion, two hundred thirty-four million, six hundred seventeen thousand, eight hundred eight".