18332744723381 has 4 divisors (see below), whose sum is σ = 19999357880064. Its totient is φ = 16666131566700.

The previous prime is 18332744723369. The next prime is 18332744723387.

18332744723381 is nontrivially palindromic in base 10.

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.

It is not a de Polignac number, because 18332744723381 - 2⁶ = 18332744723317 is a prime.

It is a super-2 number, since 2×18332744723381² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18332744723387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833306578325 + ... + 833306578346.

It is an arithmetic number, because the mean of its divisors is an integer number (4999839470016).

Almost surely, 2^{18332744723381} is an apocalyptic number.

18332744723381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18332744723381 is a deficient number, since it is larger than the sum of its proper divisors (1666613156683).

18332744723381 is a wasteful number, since it uses less digits than its factorization.

18332744723381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666613156682.

The product of its digits is 16257024, while the sum is 56.

The spelling of 18332744723381 in words is "eighteen trillion, three hundred thirty-two billion, seven hundred forty-four million, seven hundred twenty-three thousand, three hundred eighty-one".