19762848821 has 2 divisors, whose sum is σ = 19762848822. Its totient is φ = 19762848820.

The previous prime is 19762848811. The next prime is 19762848829. The reversal of 19762848821 is 12884826791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14777076721 + 4985772100 = 121561^2 + 70610^2 .

It is a cyclic number.

It is not a de Polignac number, because 19762848821 - 2²⁶ = 19695739957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19762848829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9881424410 + 9881424411.

It is an arithmetic number, because the mean of its divisors is an integer number (9881424411).

Almost surely, 2^19762848821 is an apocalyptic number.

It is an amenable number.

19762848821 is a deficient number, since it is larger than the sum of its proper divisors (1).

19762848821 is an equidigital number, since it uses as much as digits as its factorization.

19762848821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 56.

The spelling of 19762848821 in words is "nineteen billion, seven hundred sixty-two million, eight hundred forty-eight thousand, eight hundred twenty-one".