18303731407 has 36 divisors (see below), whose sum is σ = 21015061200. Its totient is φ = 15904766592.

The previous prime is 18303731333. The next prime is 18303731417. The reversal of 18303731407 is 70413730381.

It is not a de Polignac number, because 18303731407 - 2²⁷ = 18169513679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18303731417) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 17448219 + ... + 17449267.

It is an arithmetic number, because the mean of its divisors is an integer number (583751700).

Almost surely, 2^18303731407 is an apocalyptic number.

18303731407 is a deficient number, since it is larger than the sum of its proper divisors (2711329793).

18303731407 is a wasteful number, since it uses less digits than its factorization.

18303731407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 18303731407 in words is "eighteen billion, three hundred three million, seven hundred thirty-one thousand, four hundred seven".