19948519 has 2 divisors, whose sum is σ = 19948520. Its totient is φ = 19948518.

The previous prime is 19948501. The next prime is 19948529. The reversal of 19948519 is 91584991.

It is a strong prime.

It is an emirp because it is prime and its reverse (91584991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19948519 - 2⁷ = 19948391 is a prime.

It is a super-2 number, since 2×19948519² = 795886820586722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19948529) 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 as a sum of consecutive naturals, namely, 9974259 + 9974260.

It is an arithmetic number, because the mean of its divisors is an integer number (9974260).

Almost surely, 2^19948519 is an apocalyptic number.

19948519 is a deficient number, since it is larger than the sum of its proper divisors (1).

19948519 is an equidigital number, since it uses as much as digits as its factorization.

19948519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 46.

The square root of 19948519 is about 4466.3764955498. The cubic root of 19948519 is about 271.2086599843.

The spelling of 19948519 in words is "nineteen million, nine hundred forty-eight thousand, five hundred nineteen".