18394683131 has 4 divisors (see below), whose sum is σ = 20066927064. Its totient is φ = 16722439200.

The previous prime is 18394683121. The next prime is 18394683133. The reversal of 18394683131 is 13138649381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18394683131 - 2³⁰ = 17320941307 is a prime.

It is a super-2 number, since 2×18394683131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18394683133) by changing a digit.

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, 836121950 + ... + 836121971.

It is an arithmetic number, because the mean of its divisors is an integer number (5016731766).

Almost surely, 2^18394683131 is an apocalyptic number.

18394683131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18394683131 is a deficient number, since it is larger than the sum of its proper divisors (1672243933).

18394683131 is a wasteful number, since it uses less digits than its factorization.

18394683131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672243932.

The product of its digits is 373248, while the sum is 47.

The spelling of 18394683131 in words is "eighteen billion, three hundred ninety-four million, six hundred eighty-three thousand, one hundred thirty-one".