19980249 has 8 divisors (see below), whose sum is σ = 26899392. Its totient is φ = 13190640.

The previous prime is 19980241. The next prime is 19980281. The reversal of 19980249 is 94208991.

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

It is not a de Polignac number, because 19980249 - 2³ = 19980241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19980249.

It is not an unprimeable number, because it can be changed into a prime (19980241) 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, 32022 + ... + 32639.

It is an arithmetic number, because the mean of its divisors is an integer number (3362424).

Almost surely, 2^19980249 is an apocalyptic number.

It is an amenable number.

19980249 is a deficient number, since it is larger than the sum of its proper divisors (6919143).

19980249 is a wasteful number, since it uses less digits than its factorization.

19980249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64767.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 19980249 is about 4469.9271806149. The cubic root of 19980249 is about 271.3523781256.

The spelling of 19980249 in words is "nineteen million, nine hundred eighty thousand, two hundred forty-nine".