18343260949 has 8 divisors (see below), whose sum is σ = 19880106680. Its totient is φ = 16824390336.

The previous prime is 18343260941. The next prime is 18343260977. The reversal of 18343260949 is 94906234381.

It can be written as a sum of positive squares in 4 ways, for example, as 275062225 + 18068198724 = 16585^2 + 134418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18343260949 - 2³ = 18343260941 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 (18343260941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4491654 + ... + 4495735.

It is an arithmetic number, because the mean of its divisors is an integer number (2485013335).

Almost surely, 2^18343260949 is an apocalyptic number.

It is an amenable number.

18343260949 is a deficient number, since it is larger than the sum of its proper divisors (1536845731).

18343260949 is a wasteful number, since it uses less digits than its factorization.

18343260949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987559.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 18343260949 in words is "eighteen billion, three hundred forty-three million, two hundred sixty thousand, nine hundred forty-nine".