19642324187 has 2 divisors, whose sum is σ = 19642324188. Its totient is φ = 19642324186.

The previous prime is 19642324159. The next prime is 19642324201. The reversal of 19642324187 is 78142324691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19642324187 - 2⁶ = 19642324123 is a prime.

It is not a weakly prime, because it can be changed into another prime (19642324147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9821162093 + 9821162094.

It is an arithmetic number, because the mean of its divisors is an integer number (9821162094).

Almost surely, 2^19642324187 is an apocalyptic number.

19642324187 is a deficient number, since it is larger than the sum of its proper divisors (1).

19642324187 is an equidigital number, since it uses as much as digits as its factorization.

19642324187 is an evil number, because the sum of its binary digits is even.

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

The spelling of 19642324187 in words is "nineteen billion, six hundred forty-two million, three hundred twenty-four thousand, one hundred eighty-seven".