18080218944 has 168 divisors, whose sum is σ = 53161460352. Its totient is φ = 5871882240.

The previous prime is 18080218931. The next prime is 18080218957. The reversal of 18080218944 is 44981208081.

It is an interprime number because it is at equal distance from previous prime (18080218931) and next prime (18080218957).

It is a self number, because there is not a number n which added to its sum of digits gives 18080218944.

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, 14686809 + ... + 14688039.

It is an arithmetic number, because the mean of its divisors is an integer number (316437264).

Almost surely, 2^18080218944 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 18080218944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26580730176).

18080218944 is an abundant number, since it is smaller than the sum of its proper divisors (35081241408).

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

18080218944 is a wasteful number, since it uses less digits than its factorization.

18080218944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 18080218944 in words is "eighteen billion, eighty million, two hundred eighteen thousand, nine hundred forty-four".