18987056352 has 144 divisors (see below), whose sum is σ = 59213306880. Its totient is φ = 5723347200.

The previous prime is 18987056327. The next prime is 18987056401. The reversal of 18987056352 is 25365078981.

18987056352 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 70 + 563 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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, 589399 + ... + 620777.

It is an arithmetic number, because the mean of its divisors is an integer number (411203520).

Almost surely, 2^18987056352 is an apocalyptic number.

18987056352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18987056352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29606653440).

18987056352 is an abundant number, since it is smaller than the sum of its proper divisors (40226250528).

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

18987056352 is a wasteful number, since it uses less digits than its factorization.

18987056352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31597 (or 31586 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 18987056352 in words is "eighteen billion, nine hundred eighty-seven million, fifty-six thousand, three hundred fifty-two".