19987376 has 20 divisors (see below), whose sum is σ = 41004072. Its totient is φ = 9405696.

The previous prime is 19987367. The next prime is 19987379. The reversal of 19987376 is 67378991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19987379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36470 + ... + 37013.

Almost surely, 2^19987376 is an apocalyptic number.

19987376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19987376 is an abundant number, since it is smaller than the sum of its proper divisors (21016696).

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

19987376 is a wasteful number, since it uses less digits than its factorization.

19987376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73508 (or 73502 counting only the distinct ones).

The product of its digits is 571536, while the sum is 50.

The square root of 19987376 is about 4470.7243261020. The cubic root of 19987376 is about 271.3846382924.

The spelling of 19987376 in words is "nineteen million, nine hundred eighty-seven thousand, three hundred seventy-six".