19768061 has 2 divisors, whose sum is σ = 19768062. Its totient is φ = 19768060.

The previous prime is 19768051. The next prime is 19768103. The reversal of 19768061 is 16086791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 8444836 = 3365^2 + 2906^2 .

It is a cyclic number.

It is not a de Polignac number, because 19768061 - 2¹⁰ = 19767037 is a prime.

It is a zygodrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19768051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9884030 + 9884031.

It is an arithmetic number, because the mean of its divisors is an integer number (9884031).

Almost surely, 2^19768061 is an apocalyptic number.

It is an amenable number.

19768061 is a deficient number, since it is larger than the sum of its proper divisors (1).

19768061 is an equidigital number, since it uses as much as digits as its factorization.

19768061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 19768061 is about 4446.1287655667. The cubic root of 19768061 is about 270.3883802544.

The spelling of 19768061 in words is "nineteen million, seven hundred sixty-eight thousand, sixty-one".