19980880 has 40 divisors (see below), whose sum is σ = 46648800. Its totient is φ = 7959168.

The previous prime is 19980869. The next prime is 19980887. The reversal of 19980880 is 8808991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29991 + ... + 30649.

It is an arithmetic number, because the mean of its divisors is an integer number (1166220).

Almost surely, 2^19980880 is an apocalyptic number.

19980880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19980880 is an abundant number, since it is smaller than the sum of its proper divisors (26667920).

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

19980880 is a wasteful number, since it uses less digits than its factorization.

19980880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 19980880 is about 4469.9977628630. The cubic root of 19980880 is about 271.3552346390.

The spelling of 19980880 in words is "nineteen million, nine hundred eighty thousand, eight hundred eighty".