19550983 has 2 divisors, whose sum is σ = 19550984. Its totient is φ = 19550982.

The previous prime is 19550977. The next prime is 19551023. The reversal of 19550983 is 38905591.

It is an a-pointer prime, because the next prime (19551023) can be obtained adding 19550983 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19550983 - 2⁹ = 19550471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19550953) 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, 9775491 + 9775492.

It is an arithmetic number, because the mean of its divisors is an integer number (9775492).

Almost surely, 2^19550983 is an apocalyptic number.

19550983 is a deficient number, since it is larger than the sum of its proper divisors (1).

19550983 is an equidigital number, since it uses as much as digits as its factorization.

19550983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 19550983 is about 4421.6493528999. The cubic root of 19550983 is about 269.3950011078.

The spelling of 19550983 in words is "nineteen million, five hundred fifty thousand, nine hundred eighty-three".