19235470861 has 2 divisors, whose sum is σ = 19235470862. Its totient is φ = 19235470860.

The previous prime is 19235470853. The next prime is 19235470901. The reversal of 19235470861 is 16807453291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10135455625 + 9100015236 = 100675^2 + 95394^2 .

It is a cyclic number.

It is not a de Polignac number, because 19235470861 - 2³ = 19235470853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19235470801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9617735430 + 9617735431.

It is an arithmetic number, because the mean of its divisors is an integer number (9617735431).

It is a 1-persistent number, because it is pandigital, but 2⋅19235470861 = 38470941722 is not.

Almost surely, 2^19235470861 is an apocalyptic number.

It is an amenable number.

19235470861 is a deficient number, since it is larger than the sum of its proper divisors (1).

19235470861 is an equidigital number, since it uses as much as digits as its factorization.

19235470861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 19235470861 in words is "nineteen billion, two hundred thirty-five million, four hundred seventy thousand, eight hundred sixty-one".