19461242387 has 2 divisors, whose sum is σ = 19461242388. Its totient is φ = 19461242386.

The previous prime is 19461242377. The next prime is 19461242393. The reversal of 19461242387 is 78324216491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19461242387 - 2⁶ = 19461242323 is a prime.

It is not a weakly prime, because it can be changed into another prime (19461242377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9730621193 + 9730621194.

It is an arithmetic number, because the mean of its divisors is an integer number (9730621194).

Almost surely, 2^19461242387 is an apocalyptic number.

19461242387 is a deficient number, since it is larger than the sum of its proper divisors (1).

19461242387 is an equidigital number, since it uses as much as digits as its factorization.

19461242387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The spelling of 19461242387 in words is "nineteen billion, four hundred sixty-one million, two hundred forty-two thousand, three hundred eighty-seven".