19990080 has 168 divisors, whose sum is σ = 75127104. Its totient is φ = 4838400.

The previous prime is 19990057. The next prime is 19990093. The reversal of 19990080 is 8009991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31365 + ... + 31995.

Almost surely, 2^19990080 is an apocalyptic number.

19990080 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 19990080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37563552).

19990080 is an abundant number, since it is smaller than the sum of its proper divisors (55137024).

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

19990080 is a wasteful number, since it uses less digits than its factorization.

19990080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 19990080 is about 4471.0267277215. The cubic root of 19990080 is about 271.3968758663.

It can be divided in two parts, 19 and 990080, that added together give a palindrome (990099).

The spelling of 19990080 in words is "nineteen million, nine hundred ninety thousand, eighty".