18023149343 has 4 divisors (see below), whose sum is σ = 18292151640. Its totient is φ = 17754147048.

The previous prime is 18023149321. The next prime is 18023149373. The reversal of 18023149343 is 34394132081.

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-18023149343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18023149297 and 18023149306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18023149373) 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, 134501048 + ... + 134501181.

It is an arithmetic number, because the mean of its divisors is an integer number (4573037910).

Almost surely, 2^18023149343 is an apocalyptic number.

18023149343 is a deficient number, since it is larger than the sum of its proper divisors (269002297).

18023149343 is an equidigital number, since it uses as much as digits as its factorization.

18023149343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269002296.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 18023149343 in words is "eighteen billion, twenty-three million, one hundred forty-nine thousand, three hundred forty-three".