19499201287 has 2 divisors, whose sum is σ = 19499201288. Its totient is φ = 19499201286.

The previous prime is 19499201273. The next prime is 19499201329. The reversal of 19499201287 is 78210299491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19499201287 - 2¹⁹ = 19498676999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19499211287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9749600643 + 9749600644.

It is an arithmetic number, because the mean of its divisors is an integer number (9749600644).

Almost surely, 2^19499201287 is an apocalyptic number.

19499201287 is a deficient number, since it is larger than the sum of its proper divisors (1).

19499201287 is an equidigital number, since it uses as much as digits as its factorization.

19499201287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 19499201287 in words is "nineteen billion, four hundred ninety-nine million, two hundred one thousand, two hundred eighty-seven".