18712038568525 has 6 divisors (see below), whose sum is σ = 23202927825002. Its totient is φ = 14969630854800.

The previous prime is 18712038568519. The next prime is 18712038568577. The reversal of 18712038568525 is 52586583021781.

It can be written as a sum of positive squares in 3 ways, for example, as 162297791044 + 18549740777481 = 402862^2 + 4306941^2 .

It is not a de Polignac number, because 18712038568525 - 2¹¹ = 18712038566477 is a prime.

It is a super-2 number, since 2×18712038568525² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374240771346 + ... + 374240771395.

Almost surely, 2^{18712038568525} is an apocalyptic number.

It is an amenable number.

18712038568525 is a deficient number, since it is larger than the sum of its proper divisors (4490889256477).

18712038568525 is an equidigital number, since it uses as much as digits as its factorization.

18712038568525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748481542751 (or 748481542746 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 61.

The spelling of 18712038568525 in words is "eighteen trillion, seven hundred twelve billion, thirty-eight million, five hundred sixty-eight thousand, five hundred twenty-five".