18887681357325 has 336 divisors, whose sum is σ = 40012949721600. Its totient is φ = 8750717712000.

The previous prime is 18887681357309. The next prime is 18887681357333. The reversal of 18887681357325 is 52375318678881.

It is a happy number.

18887681357325 is a `hidden beast` number, since 18 + 8 + 8 + 7 + 6 + 8 + 13 + 573 + 25 = 666.

It is not a de Polignac number, because 18887681357325 - 2⁴ = 18887681357309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 7833960370 + ... + 7833962780.

Almost surely, 2^{18887681357325} is an apocalyptic number.

18887681357325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18887681357325 is an abundant number, since it is smaller than the sum of its proper divisors (21125268364275).

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

18887681357325 is a wasteful number, since it uses less digits than its factorization.

18887681357325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4172 (or 4152 counting only the distinct ones).

The product of its digits is 541900800, while the sum is 72.

The spelling of 18887681357325 in words is "eighteen trillion, eight hundred eighty-seven billion, six hundred eighty-one million, three hundred fifty-seven thousand, three hundred twenty-five".