19439948347 has 2 divisors, whose sum is σ = 19439948348. Its totient is φ = 19439948346.

The previous prime is 19439948323. The next prime is 19439948369. The reversal of 19439948347 is 74384993491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19439948347 - 2²³ = 19431559739 is a prime.

It is not a weakly prime, because it can be changed into another prime (19439948447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9719974173 + 9719974174.

It is an arithmetic number, because the mean of its divisors is an integer number (9719974174).

Almost surely, 2^19439948347 is an apocalyptic number.

19439948347 is a deficient number, since it is larger than the sum of its proper divisors (1).

19439948347 is an equidigital number, since it uses as much as digits as its factorization.

19439948347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 61.

The spelling of 19439948347 in words is "nineteen billion, four hundred thirty-nine million, nine hundred forty-eight thousand, three hundred forty-seven".