18216500730 has 16 divisors (see below), whose sum is σ = 43719601824. Its totient is φ = 4857733520.

The previous prime is 18216500711. The next prime is 18216500741. The reversal of 18216500730 is 3700561281.

It is a junction number, because it is equal to n+sod(n) for n = 18216500691 and 18216500700.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303608316 + ... + 303608375.

It is an arithmetic number, because the mean of its divisors is an integer number (2732475114).

Almost surely, 2^18216500730 is an apocalyptic number.

18216500730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18216500730 is an abundant number, since it is smaller than the sum of its proper divisors (25503101094).

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

18216500730 is a wasteful number, since it uses less digits than its factorization.

18216500730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607216701.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 18216500730 in words is "eighteen billion, two hundred sixteen million, five hundred thousand, seven hundred thirty".