19700087447 has 2 divisors, whose sum is σ = 19700087448. Its totient is φ = 19700087446.

The previous prime is 19700087437. The next prime is 19700087453. The reversal of 19700087447 is 74478000791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19700087447 - 2²⁸ = 19431651991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19700087437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9850043723 + 9850043724.

It is an arithmetic number, because the mean of its divisors is an integer number (9850043724).

Almost surely, 2^19700087447 is an apocalyptic number.

19700087447 is a deficient number, since it is larger than the sum of its proper divisors (1).

19700087447 is an equidigital number, since it uses as much as digits as its factorization.

19700087447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 19700087447 in words is "nineteen billion, seven hundred million, eighty-seven thousand, four hundred forty-seven".