19980080 has 40 divisors (see below), whose sum is σ = 46818432. Its totient is φ = 7929344.

The previous prime is 19980073. The next prime is 19980091. The reversal of 19980080 is 8008991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 19980080.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10049 + ... + 11871.

Almost surely, 2^19980080 is an apocalyptic number.

19980080 is a gapful number since it is divisible by the number (10) 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 19980080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23409216).

19980080 is an abundant number, since it is smaller than the sum of its proper divisors (26838352).

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

19980080 is a wasteful number, since it uses less digits than its factorization.

19980080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 19980080 is about 4469.9082764638. The cubic root of 19980080 is about 271.3516130587.

The spelling of 19980080 in words is "nineteen million, nine hundred eighty thousand, eighty".