18303402312 has 48 divisors (see below), whose sum is σ = 53384926140. Its totient is φ = 5631815808.

The previous prime is 18303402301. The next prime is 18303402331. The reversal of 18303402312 is 21320430381.

18303402312 is a `hidden beast` number, since 1 + 8 + 3 + 0 + 340 + 2 + 312 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15935022756 + 2368379556 = 126234^2 + 48666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9776523 + ... + 9778394.

Almost surely, 2^18303402312 is an apocalyptic number.

18303402312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18303402312 is an abundant number, since it is smaller than the sum of its proper divisors (35081523828).

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

18303402312 is a wasteful number, since it uses less digits than its factorization.

18303402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19554942 (or 19554935 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 18303402312 its reverse (21320430381), we get a palindrome (39623832693).

The spelling of 18303402312 in words is "eighteen billion, three hundred three million, four hundred two thousand, three hundred twelve".