19982407 has 2 divisors, whose sum is σ = 19982408. Its totient is φ = 19982406.

The previous prime is 19982399. The next prime is 19982437. The reversal of 19982407 is 70428991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19982407 - 2³ = 19982399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19982407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19982437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9991203 + 9991204.

It is an arithmetic number, because the mean of its divisors is an integer number (9991204).

Almost surely, 2^19982407 is an apocalyptic number.

19982407 is a deficient number, since it is larger than the sum of its proper divisors (1).

19982407 is an equidigital number, since it uses as much as digits as its factorization.

19982407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 19982407 is about 4470.1685650543. The cubic root of 19982407 is about 271.3621470621.

The spelling of 19982407 in words is "nineteen million, nine hundred eighty-two thousand, four hundred seven".