18987936552486 has 48 divisors (see below), whose sum is σ = 45068362260480. Its totient is φ = 5729845173360.

The previous prime is 18987936552451. The next prime is 18987936552503. The reversal of 18987936552486 is 68425563978981.

18987936552486 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 7 + 9 + 3 + 6 + 5 + 524 + 86 = 666.

It is a super-3 number, since 3×18987936552486³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200577510 + ... + 200672153.

It is an arithmetic number, because the mean of its divisors is an integer number (938924213760).

Almost surely, 2^{18987936552486} is an apocalyptic number.

18987936552486 is an abundant number, since it is smaller than the sum of its proper divisors (26080425707994).

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

18987936552486 is a wasteful number, since it uses less digits than its factorization.

18987936552486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401249921 (or 401249918 counting only the distinct ones).

The product of its digits is 6270566400, while the sum is 81.

The spelling of 18987936552486 in words is "eighteen trillion, nine hundred eighty-seven billion, nine hundred thirty-six million, five hundred fifty-two thousand, four hundred eighty-six".