19628487469 has 2 divisors, whose sum is σ = 19628487470. Its totient is φ = 19628487468.

The previous prime is 19628487449. The next prime is 19628487481. The reversal of 19628487469 is 96478482691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17434033444 + 2194454025 = 132038^2 + 46845^2 .

It is a cyclic number.

It is not a de Polignac number, because 19628487469 - 2¹⁵ = 19628454701 is a prime.

It is a super-2 number, since 2×19628487469² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19628487469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19628487449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9814243734 + 9814243735.

It is an arithmetic number, because the mean of its divisors is an integer number (9814243735).

Almost surely, 2^19628487469 is an apocalyptic number.

It is an amenable number.

19628487469 is a deficient number, since it is larger than the sum of its proper divisors (1).

19628487469 is an equidigital number, since it uses as much as digits as its factorization.

19628487469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41803776, while the sum is 64.

The spelling of 19628487469 in words is "nineteen billion, six hundred twenty-eight million, four hundred eighty-seven thousand, four hundred sixty-nine".