19985480 has 16 divisors (see below), whose sum is σ = 44967420. Its totient is φ = 7994176.

The previous prime is 19985467. The next prime is 19985501. The reversal of 19985480 is 8458991.

It can be written as a sum of positive squares in 2 ways, for example, as 17656804 + 2328676 = 4202^2 + 1526^2 .

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, 249779 + ... + 249858.

Almost surely, 2^19985480 is an apocalyptic number.

19985480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19985480 is an abundant number, since it is smaller than the sum of its proper divisors (24981940).

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

19985480 is a wasteful number, since it uses less digits than its factorization.

19985480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499648 (or 499644 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 19985480 is about 4470.5122748965. The cubic root of 19985480 is about 271.3760568500.

The spelling of 19985480 in words is "nineteen million, nine hundred eighty-five thousand, four hundred eighty".