19461242887 has 2 divisors, whose sum is σ = 19461242888. Its totient is φ = 19461242886.

The previous prime is 19461242863. The next prime is 19461242893. The reversal of 19461242887 is 78824216491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19461242887 - 2¹¹ = 19461240839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19461242387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9730621443 + 9730621444.

It is an arithmetic number, because the mean of its divisors is an integer number (9730621444).

Almost surely, 2^19461242887 is an apocalyptic number.

19461242887 is a deficient number, since it is larger than the sum of its proper divisors (1).

19461242887 is an equidigital number, since it uses as much as digits as its factorization.

19461242887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 52.

The spelling of 19461242887 in words is "nineteen billion, four hundred sixty-one million, two hundred forty-two thousand, eight hundred eighty-seven".