19428179647 has 2 divisors, whose sum is σ = 19428179648. Its totient is φ = 19428179646.

The previous prime is 19428179623. The next prime is 19428179651. The reversal of 19428179647 is 74697182491.

It is a strong prime.

It is an emirp because it is prime and its reverse (74697182491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19428179647 - 2¹⁵ = 19428146879 is a prime.

It is a super-2 number, since 2×19428179647² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19428179591 and 19428179600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19428179657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714089823 + 9714089824.

It is an arithmetic number, because the mean of its divisors is an integer number (9714089824).

Almost surely, 2^19428179647 is an apocalyptic number.

19428179647 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428179647 is an equidigital number, since it uses as much as digits as its factorization.

19428179647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 58.

The spelling of 19428179647 in words is "nineteen billion, four hundred twenty-eight million, one hundred seventy-nine thousand, six hundred forty-seven".