18373029481 has 4 divisors (see below), whose sum is σ = 18551408512. Its totient is φ = 18194650452.

The previous prime is 18373029413. The next prime is 18373029509. The reversal of 18373029481 is 18492037381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18492037381 = 601 ⋅30768781.

It is a cyclic number.

It is not a de Polignac number, because 18373029481 - 2⁹ = 18373028969 is a prime.

It is a super-2 number, since 2×18373029481² (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 (18373020481) 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, 89189361 + ... + 89189566.

It is an arithmetic number, because the mean of its divisors is an integer number (4637852128).

Almost surely, 2^18373029481 is an apocalyptic number.

It is an amenable number.

18373029481 is a deficient number, since it is larger than the sum of its proper divisors (178379031).

18373029481 is a wasteful number, since it uses less digits than its factorization.

18373029481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178379030.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 18373029481 in words is "eighteen billion, three hundred seventy-three million, twenty-nine thousand, four hundred eighty-one".