19267938461 has 2 divisors, whose sum is σ = 19267938462. Its totient is φ = 19267938460.

The previous prime is 19267938449. The next prime is 19267938509. The reversal of 19267938461 is 16483976291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16203762436 + 3064176025 = 127294^2 + 55355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19267938461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19267938397 and 19267938406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19267935461) 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, 9633969230 + 9633969231.

It is an arithmetic number, because the mean of its divisors is an integer number (9633969231).

Almost surely, 2^19267938461 is an apocalyptic number.

It is an amenable number.

19267938461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19267938461 is an equidigital number, since it uses as much as digits as its factorization.

19267938461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The spelling of 19267938461 in words is "nineteen billion, two hundred sixty-seven million, nine hundred thirty-eight thousand, four hundred sixty-one".