19991480 has 16 divisors (see below), whose sum is σ = 44980920. Its totient is φ = 7996576.

The previous prime is 19991467. The next prime is 19991483. The reversal of 19991480 is 8419991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19991483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249854 + ... + 249933.

Almost surely, 2^19991480 is an apocalyptic number.

19991480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19991480 is an abundant number, since it is smaller than the sum of its proper divisors (24989440).

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

19991480 is a wasteful number, since it uses less digits than its factorization.

19991480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499798 (or 499794 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 19991480 is about 4471.1832885714. The cubic root of 19991480 is about 271.4032114547.

The spelling of 19991480 in words is "nineteen million, nine hundred ninety-one thousand, four hundred eighty".