18670728726318 has 16 divisors (see below), whose sum is σ = 38629093916880. Its totient is φ = 6008970164736.

The previous prime is 18670728726317. The next prime is 18670728726319. The reversal of 18670728726318 is 81362782707681.

It is an interprime number because it is at equal distance from previous prime (18670728726317) and next prime (18670728726319).

It is a super-2 number, since 2×18670728726318² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18670728726313) 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, 53651519155 + ... + 53651519502.

It is an arithmetic number, because the mean of its divisors is an integer number (2414318369805).

Almost surely, 2^{18670728726318} is an apocalyptic number.

18670728726318 is an abundant number, since it is smaller than the sum of its proper divisors (19958365190562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18670728726318 is a wasteful number, since it uses less digits than its factorization.

18670728726318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107303038691.

The product of its (nonzero) digits is 75866112, while the sum is 66.

The spelling of 18670728726318 in words is "eighteen trillion, six hundred seventy billion, seven hundred twenty-eight million, seven hundred twenty-six thousand, three hundred eighteen".