18830739823 has 4 divisors (see below), whose sum is σ = 21520845520. Its totient is φ = 16140634128.

The previous prime is 18830739797. The next prime is 18830739859. The reversal of 18830739823 is 32893703881.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18830739823 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 (18830739923) 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, 1345052838 + ... + 1345052851.

It is an arithmetic number, because the mean of its divisors is an integer number (5380211380).

Almost surely, 2^18830739823 is an apocalyptic number.

18830739823 is a deficient number, since it is larger than the sum of its proper divisors (2690105697).

18830739823 is an equidigital number, since it uses as much as digits as its factorization.

18830739823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690105696.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 18830739823 in words is "eighteen billion, eight hundred thirty million, seven hundred thirty-nine thousand, eight hundred twenty-three".