19428047 has 2 divisors, whose sum is σ = 19428048. Its totient is φ = 19428046.

The previous prime is 19428043. The next prime is 19428053. The reversal of 19428047 is 74082491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19428047 - 2² = 19428043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19427998 and 19428016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19428043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714023 + 9714024.

It is an arithmetic number, because the mean of its divisors is an integer number (9714024).

Almost surely, 2^19428047 is an apocalyptic number.

19428047 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428047 is an equidigital number, since it uses as much as digits as its factorization.

19428047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 19428047 is about 4407.7258308565. The cubic root of 19428047 is about 268.8291642035.

The spelling of 19428047 in words is "nineteen million, four hundred twenty-eight thousand, forty-seven".