19688051 has 2 divisors, whose sum is σ = 19688052. Its totient is φ = 19688050.

The previous prime is 19688041. The next prime is 19688063. The reversal of 19688051 is 15088691.

It is a weak prime.

It is an emirp because it is prime and its reverse (15088691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19688051 - 2¹⁴ = 19671667 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19687996 and 19688014.

It is not a weakly prime, because it can be changed into another prime (19688041) 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, 9844025 + 9844026.

It is an arithmetic number, because the mean of its divisors is an integer number (9844026).

Almost surely, 2^19688051 is an apocalyptic number.

19688051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19688051 is an equidigital number, since it uses as much as digits as its factorization.

19688051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 19688051 is about 4437.1219275562. The cubic root of 19688051 is about 270.0230935894.

The spelling of 19688051 in words is "nineteen million, six hundred eighty-eight thousand, fifty-one".