19880243 has 4 divisors (see below), whose sum is σ = 20119848. Its totient is φ = 19640640.

The previous prime is 19880239. The next prime is 19880261. The reversal of 19880243 is 34208891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19880243 - 2² = 19880239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19882243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119678 + ... + 119843.

It is an arithmetic number, because the mean of its divisors is an integer number (5029962).

Almost surely, 2^19880243 is an apocalyptic number.

19880243 is a deficient number, since it is larger than the sum of its proper divisors (239605).

19880243 is an equidigital number, since it uses as much as digits as its factorization.

19880243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239604.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 19880243 is about 4458.7266119375. The cubic root of 19880243 is about 270.8988924895.

The spelling of 19880243 in words is "nineteen million, eight hundred eighty thousand, two hundred forty-three".