19628057 has 2 divisors, whose sum is σ = 19628058. Its totient is φ = 19628056.

The previous prime is 19628029. The next prime is 19628071. The reversal of 19628057 is 75082691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15531481 + 4096576 = 3941^2 + 2024^2 .

It is an emirp because it is prime and its reverse (75082691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19628057 - 2¹⁴ = 19611673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19628057.

It is not a weakly prime, because it can be changed into another prime (19628017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9814028 + 9814029.

It is an arithmetic number, because the mean of its divisors is an integer number (9814029).

Almost surely, 2^19628057 is an apocalyptic number.

It is an amenable number.

19628057 is a deficient number, since it is larger than the sum of its proper divisors (1).

19628057 is an equidigital number, since it uses as much as digits as its factorization.

19628057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 19628057 is about 4430.3563062129. The cubic root of 19628057 is about 269.7485404575.

The spelling of 19628057 in words is "nineteen million, six hundred twenty-eight thousand, fifty-seven".