18238992349 has 4 divisors (see below), whose sum is σ = 18627056064. Its totient is φ = 17850928636.

The previous prime is 18238992323. The next prime is 18238992361. The reversal of 18238992349 is 94329983281.

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: 94329983281 = 290791 ⋅324391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18238992349 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18238992293 and 18238992302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18238990349) 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, 194031787 + ... + 194031880.

It is an arithmetic number, because the mean of its divisors is an integer number (4656764016).

Almost surely, 2^18238992349 is an apocalyptic number.

It is an amenable number.

18238992349 is a deficient number, since it is larger than the sum of its proper divisors (388063715).

18238992349 is an equidigital number, since it uses as much as digits as its factorization.

18238992349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388063714.

The product of its digits is 6718464, while the sum is 58.

The spelling of 18238992349 in words is "eighteen billion, two hundred thirty-eight million, nine hundred ninety-two thousand, three hundred forty-nine".