19490514187 has 2 divisors, whose sum is σ = 19490514188. Its totient is φ = 19490514186.

The previous prime is 19490514133. The next prime is 19490514217. The reversal of 19490514187 is 78141509491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19490514187 - 2²⁷ = 19356296459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19490514187.

It is not a weakly prime, because it can be changed into another prime (19490514107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9745257093 + 9745257094.

It is an arithmetic number, because the mean of its divisors is an integer number (9745257094).

Almost surely, 2^19490514187 is an apocalyptic number.

19490514187 is a deficient number, since it is larger than the sum of its proper divisors (1).

19490514187 is an equidigital number, since it uses as much as digits as its factorization.

19490514187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 19490514187 in words is "nineteen billion, four hundred ninety million, five hundred fourteen thousand, one hundred eighty-seven".