18302011830 has 64 divisors (see below), whose sum is σ = 48893388480. Its totient is φ = 4871734272.

The previous prime is 18302011817. The next prime is 18302011913. The reversal of 18302011830 is 3811020381.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18302011794 and 18302011803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89542 + ... + 211238.

It is an arithmetic number, because the mean of its divisors is an integer number (763959195).

Almost surely, 2^18302011830 is an apocalyptic number.

18302011830 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 18302011830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24446694240).

18302011830 is an abundant number, since it is smaller than the sum of its proper divisors (30591376650).

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

18302011830 is a wasteful number, since it uses less digits than its factorization.

18302011830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122270 (or 122264 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 18302011830 in words is "eighteen billion, three hundred two million, eleven thousand, eight hundred thirty".