18816488730 has 216 divisors, whose sum is σ = 55042799292. Its totient is φ = 4629021696.

The previous prime is 18816488729. The next prime is 18816488737. The reversal of 18816488730 is 3788461881.

It is a happy number.

18816488730 is a `hidden beast` number, since 1 + 88 + 16 + 488 + 73 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6339822129 + 12476666601 = 79623^2 + 111699^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18816488737) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 11087242 + ... + 11088938.

Almost surely, 2^18816488730 is an apocalyptic number.

18816488730 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 18816488730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27521399646).

18816488730 is an abundant number, since it is smaller than the sum of its proper divisors (36226310562).

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

18816488730 is an equidigital number, since it uses as much as digits as its factorization.

18816488730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 18816488730 in words is "eighteen billion, eight hundred sixteen million, four hundred eighty-eight thousand, seven hundred thirty".