19981088 has 24 divisors (see below), whose sum is σ = 39817008. Its totient is φ = 9868864.

The previous prime is 19981079. The next prime is 19981109. The reversal of 19981088 is 88018991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106 + ... + 6417.

It is an arithmetic number, because the mean of its divisors is an integer number (1659042).

Almost surely, 2^19981088 is an apocalyptic number.

It is an amenable number.

19981088 is a deficient number, since it is larger than the sum of its proper divisors (19835920).

19981088 is an equidigital number, since it uses as much as digits as its factorization.

19981088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616 (or 7608 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 19981088 is about 4470.0210290333. The cubic root of 19981088 is about 271.3561762340.

The spelling of 19981088 in words is "nineteen million, nine hundred eighty-one thousand, eighty-eight".