18382910923 has 4 divisors (see below), whose sum is σ = 19796981008. Its totient is φ = 16968840840.

The previous prime is 18382910911. The next prime is 18382910933. The reversal of 18382910923 is 32901928381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32901928381 = 7 ⋅4700275483.

It is a cyclic number.

It is not a de Polignac number, because 18382910923 - 2⁹ = 18382910411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18382910933) 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, 707035023 + ... + 707035048.

It is an arithmetic number, because the mean of its divisors is an integer number (4949245252).

Almost surely, 2^18382910923 is an apocalyptic number.

18382910923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18382910923 is a deficient number, since it is larger than the sum of its proper divisors (1414070085).

18382910923 is a wasteful number, since it uses less digits than its factorization.

18382910923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414070084.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 18382910923 in words is "eighteen billion, three hundred eighty-two million, nine hundred ten thousand, nine hundred twenty-three".