19628451001 has 2 divisors, whose sum is σ = 19628451002. Its totient is φ = 19628451000.

The previous prime is 19628450993. The next prime is 19628451013. The reversal of 19628451001 is 10015482691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15301442601 + 4327008400 = 123699^2 + 65780^2 .

It is an emirp because it is prime and its reverse (10015482691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19628451001 - 2³ = 19628450993 is a prime.

It is a super-4 number, since 4×19628451001⁴ (a number of 42 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (19628451301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9814225500 + 9814225501.

It is an arithmetic number, because the mean of its divisors is an integer number (9814225501).

Almost surely, 2^19628451001 is an apocalyptic number.

It is an amenable number.

19628451001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19628451001 is an equidigital number, since it uses as much as digits as its factorization.

19628451001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 19628451001 in words is "nineteen billion, six hundred twenty-eight million, four hundred fifty-one thousand, one".