18716702481 has 33 divisors (see below), whose sum is σ = 28124850409. Its totient is φ = 12455638596.

The previous prime is 18716702467. The next prime is 18716702519. The reversal of 18716702481 is 18420761781.

The square root of 18716702481 is 136809.

It is a perfect power (a square), and thus also a powerful number.

18716702481 is a `hidden beast` number, since 1 + 8 + 7 + 167 + 0 + 2 + 481 = 666.

It is not a de Polignac number, because 18716702481 - 2⁷ = 18716702353 is a prime.

It is a super-2 number, since 2×18716702481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18716702401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 33244306 + ... + 33244868.

Almost surely, 2^18716702481 is an apocalyptic number.

18716702481 is the 136809-th square number.

18716702481 is the 68405-th centered octagonal number.

It is an amenable number.

18716702481 is a deficient number, since it is larger than the sum of its proper divisors (9408147928).

18716702481 is an frugal number, since it uses more digits than its factorization.

18716702481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156 (or 566 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 18716702481 in words is "eighteen billion, seven hundred sixteen million, seven hundred two thousand, four hundred eighty-one".