19880247 has 16 divisors (see below), whose sum is σ = 27306720. Its totient is φ = 12859392.

The previous prime is 19880239. The next prime is 19880261. The reversal of 19880247 is 74208891.

It is not a de Polignac number, because 19880247 - 2³ = 19880239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19880297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14779 + ... + 16067.

It is an arithmetic number, because the mean of its divisors is an integer number (1706670).

Almost surely, 2^19880247 is an apocalyptic number.

19880247 is a deficient number, since it is larger than the sum of its proper divisors (7426473).

19880247 is a wasteful number, since it uses less digits than its factorization.

19880247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 19880247 is about 4458.7270604961. The cubic root of 19880247 is about 270.8989106582.

The spelling of 19880247 in words is "nineteen million, eight hundred eighty thousand, two hundred forty-seven".