19998080 has 32 divisors (see below), whose sum is σ = 47809440. Its totient is φ = 7998976.

The previous prime is 19998047. The next prime is 19998149. The reversal of 19998080 is 8089991.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent 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, 14984 + ... + 16263.

It is an arithmetic number, because the mean of its divisors is an integer number (1494045).

Almost surely, 2^19998080 is an apocalyptic number.

19998080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19998080 is an abundant number, since it is smaller than the sum of its proper divisors (27811360).

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

19998080 is an equidigital number, since it uses as much as digits as its factorization.

19998080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31266 (or 31254 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 19998080 is about 4471.9212873216. The cubic root of 19998080 is about 271.4330752451.

The spelling of 19998080 in words is "nineteen million, nine hundred ninety-eight thousand, eighty".