18308198790 has 288 divisors, whose sum is σ = 61720794720. Its totient is φ = 3730987008.

The previous prime is 18308198761. The next prime is 18308198791. The reversal of 18308198790 is 9789180381.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18308198791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1418004 + ... + 1430856.

It is an arithmetic number, because the mean of its divisors is an integer number (214308315).

Almost surely, 2^18308198790 is an apocalyptic number.

18308198790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18308198790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30860397360).

18308198790 is an abundant number, since it is smaller than the sum of its proper divisors (43412595930).

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

18308198790 is a wasteful number, since it uses less digits than its factorization.

18308198790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12916 (or 12906 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 54.

The spelling of 18308198790 in words is "eighteen billion, three hundred eight million, one hundred ninety-eight thousand, seven hundred ninety".