19987552 has 48 divisors (see below), whose sum is σ = 44241120. Its totient is φ = 8819712.

The previous prime is 19987543. The next prime is 19987567. The reversal of 19987552 is 25578991.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8524 + ... + 10612.

It is an arithmetic number, because the mean of its divisors is an integer number (921690).

Almost surely, 2^19987552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19987552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22120560).

19987552 is an abundant number, since it is smaller than the sum of its proper divisors (24253568).

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

19987552 is a wasteful number, since it uses less digits than its factorization.

19987552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 2127 counting only the distinct ones).

The product of its digits is 226800, while the sum is 46.

The square root of 19987552 is about 4470.7440096700. The cubic root of 19987552 is about 271.3854348545.

The spelling of 19987552 in words is "nineteen million, nine hundred eighty-seven thousand, five hundred fifty-two".