19020170649 has 4 divisors (see below), whose sum is σ = 25360227536. Its totient is φ = 12680113764.

The previous prime is 19020170633. The next prime is 19020170677. The reversal of 19020170649 is 94607102091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94607102091 = 3 ⋅31535700697.

It is not a de Polignac number, because 19020170649 - 2⁴ = 19020170633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19020170699) 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, 3170028439 + ... + 3170028444.

It is an arithmetic number, because the mean of its divisors is an integer number (6340056884).

Almost surely, 2^19020170649 is an apocalyptic number.

It is an amenable number.

19020170649 is a deficient number, since it is larger than the sum of its proper divisors (6340056887).

19020170649 is an equidigital number, since it uses as much as digits as its factorization.

19020170649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340056886.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 19020170649 in words is "nineteen billion, twenty million, one hundred seventy thousand, six hundred forty-nine".