18648093311 has 4 divisors (see below), whose sum is σ = 18648405000. Its totient is φ = 18647781624.

The previous prime is 18648093283. The next prime is 18648093313. The reversal of 18648093311 is 11339084681.

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-18648093311 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 (18648093313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34721 + ... + 196218.

It is an arithmetic number, because the mean of its divisors is an integer number (4662101250).

Almost surely, 2^18648093311 is an apocalyptic number.

18648093311 is a deficient number, since it is larger than the sum of its proper divisors (311689).

18648093311 is an equidigital number, since it uses as much as digits as its factorization.

18648093311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311688.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 18648093311 in words is "eighteen billion, six hundred forty-eight million, ninety-three thousand, three hundred eleven".