18311344658 has 32 divisors (see below), whose sum is σ = 29413712640. Its totient is φ = 8523740160.

The previous prime is 18311344651. The next prime is 18311344663. The reversal of 18311344658 is 85644311381.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18311344651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3073010 + ... + 3078962.

It is an arithmetic number, because the mean of its divisors is an integer number (919178520).

Almost surely, 2^18311344658 is an apocalyptic number.

18311344658 is a deficient number, since it is larger than the sum of its proper divisors (11102367982).

18311344658 is a wasteful number, since it uses less digits than its factorization.

18311344658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7362.

The product of its digits is 276480, while the sum is 44.

The spelling of 18311344658 in words is "eighteen billion, three hundred eleven million, three hundred forty-four thousand, six hundred fifty-eight".