19280500849 has 4 divisors (see below), whose sum is σ = 19497135780. Its totient is φ = 19063865920.

The previous prime is 19280500847. The next prime is 19280500859. The reversal of 19280500849 is 94800508291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4443555600 + 14836945249 = 66660^2 + 121807^2 .

It is a cyclic number.

It is not a de Polignac number, because 19280500849 - 2¹ = 19280500847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19280500799 and 19280500808.

It is not an unprimeable number, because it can be changed into a prime (19280500843) 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 in 3 ways as a sum of consecutive naturals, for example, 108317332 + ... + 108317509.

It is an arithmetic number, because the mean of its divisors is an integer number (4874283945).

Almost surely, 2^19280500849 is an apocalyptic number.

It is an amenable number.

19280500849 is a deficient number, since it is larger than the sum of its proper divisors (216634931).

19280500849 is an equidigital number, since it uses as much as digits as its factorization.

19280500849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216634930.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 19280500849 in words is "nineteen billion, two hundred eighty million, five hundred thousand, eight hundred forty-nine".