18620645088 has 192 divisors, whose sum is σ = 54638115840. Its totient is φ = 5518098432.

The previous prime is 18620645063. The next prime is 18620645089. The reversal of 18620645088 is 88054602681.

It is a happy number.

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 (18620645089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14356056 + ... + 14357352.

It is an arithmetic number, because the mean of its divisors is an integer number (284573520).

Almost surely, 2^18620645088 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 18620645088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27319057920).

18620645088 is an abundant number, since it is smaller than the sum of its proper divisors (36017470752).

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

18620645088 is a wasteful number, since it uses less digits than its factorization.

18620645088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809 (or 1801 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 18620645088 in words is "eighteen billion, six hundred twenty million, six hundred forty-five thousand, eighty-eight".