19982431 has 8 divisors (see below), whose sum is σ = 23268384. Its totient is φ = 16804320.

The previous prime is 19982407. The next prime is 19982437. The reversal of 19982431 is 13428991.

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 19982431 - 2⁵ = 19982399 is a prime.

It is a super-2 number, since 2×19982431² = 798595097339522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19982437) 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, 26560 + ... + 27301.

It is an arithmetic number, because the mean of its divisors is an integer number (2908548).

Almost surely, 2^19982431 is an apocalyptic number.

19982431 is a deficient number, since it is larger than the sum of its proper divisors (3285953).

19982431 is an equidigital number, since it uses as much as digits as its factorization.

19982431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53921.

The product of its digits is 15552, while the sum is 37.

The square root of 19982431 is about 4470.1712495161. The cubic root of 19982431 is about 271.3622557024.

The spelling of 19982431 in words is "nineteen million, nine hundred eighty-two thousand, four hundred thirty-one".