19274647487 has 2 divisors, whose sum is σ = 19274647488. Its totient is φ = 19274647486.

The previous prime is 19274647471. The next prime is 19274647523. The reversal of 19274647487 is 78474647291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19274647487 - 2⁴ = 19274647471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19274647687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9637323743 + 9637323744.

It is an arithmetic number, because the mean of its divisors is an integer number (9637323744).

Almost surely, 2^19274647487 is an apocalyptic number.

19274647487 is a deficient number, since it is larger than the sum of its proper divisors (1).

19274647487 is an equidigital number, since it uses as much as digits as its factorization.

19274647487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18966528, while the sum is 59.

The spelling of 19274647487 in words is "nineteen billion, two hundred seventy-four million, six hundred forty-seven thousand, four hundred eighty-seven".