18711306495 has 96 divisors (see below), whose sum is σ = 40713753600. Its totient is φ = 7751158272.

The previous prime is 18711306473. The next prime is 18711306503. The reversal of 18711306495 is 59460311781.

It is not a de Polignac number, because 18711306495 - 2⁵ = 18711306463 is a prime.

It is a super-2 number, since 2×18711306495² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18711306495.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 69691 + ... + 205619.

It is an arithmetic number, because the mean of its divisors is an integer number (424101600).

Almost surely, 2^18711306495 is an apocalyptic number.

18711306495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18711306495 is an abundant number, since it is smaller than the sum of its proper divisors (22002447105).

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

18711306495 is a wasteful number, since it uses less digits than its factorization.

18711306495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135989 (or 135986 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 18711306495 in words is "eighteen billion, seven hundred eleven million, three hundred six thousand, four hundred ninety-five".