18302105840 has 20 divisors (see below), whose sum is σ = 42552396264. Its totient is φ = 7320842304.

The previous prime is 18302105839. The next prime is 18302105863. The reversal of 18302105840 is 4850120381.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 18302105797 and 18302105806.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 114388082 + ... + 114388241.

Almost surely, 2^18302105840 is an apocalyptic number.

18302105840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18302105840 is an abundant number, since it is smaller than the sum of its proper divisors (24250290424).

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

18302105840 is a wasteful number, since it uses less digits than its factorization.

18302105840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228776336 (or 228776330 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 18302105840 in words is "eighteen billion, three hundred two million, one hundred five thousand, eight hundred forty".