19216980 has 96 divisors (see below), whose sum is σ = 62966400. Its totient is φ = 4852224.

The previous prime is 19216979. The next prime is 19217017. The reversal of 19216980 is 8961291.

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

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9324 + ... + 11196.

It is an arithmetic number, because the mean of its divisors is an integer number (655900).

Almost surely, 2^19216980 is an apocalyptic number.

19216980 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 19216980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31483200).

19216980 is an abundant number, since it is smaller than the sum of its proper divisors (43749420).

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

19216980 is a wasteful number, since it uses less digits than its factorization.

19216980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 19216980 is about 4383.7176003935. The cubic root of 19216980 is about 267.8520940763.

The spelling of 19216980 in words is "nineteen million, two hundred sixteen thousand, nine hundred eighty".