18303731450 has 48 divisors (see below), whose sum is σ = 35320358400. Its totient is φ = 7049592000.

The previous prime is 18303731429. The next prime is 18303731473. The reversal of 18303731450 is 5413730381.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18303731450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278780 + ... + 338120.

It is an arithmetic number, because the mean of its divisors is an integer number (735840800).

Almost surely, 2^18303731450 is an apocalyptic number.

18303731450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18303731450 is a deficient number, since it is larger than the sum of its proper divisors (17016626950).

18303731450 is a wasteful number, since it uses less digits than its factorization.

18303731450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59583 (or 59578 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 18303731450 in words is "eighteen billion, three hundred three million, seven hundred thirty-one thousand, four hundred fifty".