19980043 has 8 divisors (see below), whose sum is σ = 20872800. Its totient is φ = 19100928.

The previous prime is 19980041. The next prime is 19980053. The reversal of 19980043 is 34008991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19980043 - 2¹ = 19980041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19979990 and 19980008.

It is not an unprimeable number, because it can be changed into a prime (19980041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (2609100).

Almost surely, 2^19980043 is an apocalyptic number.

19980043 is a deficient number, since it is larger than the sum of its proper divisors (892757).

19980043 is a wasteful number, since it uses less digits than its factorization.

19980043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6821.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19980043 is about 4469.9041376745. The cubic root of 19980043 is about 271.3514455582.

The spelling of 19980043 in words is "nineteen million, nine hundred eighty thousand, forty-three".