19900000619 has 2 divisors, whose sum is σ = 19900000620. Its totient is φ = 19900000618.

The previous prime is 19900000553. The next prime is 19900000667. The reversal of 19900000619 is 91600000991.

It is a strong prime.

It is an emirp because it is prime and its reverse (91600000991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19900000619 - 2⁸ = 19900000363 is a prime.

It is a super-2 number, since 2×19900000619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19900000019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9950000309 + 9950000310.

It is an arithmetic number, because the mean of its divisors is an integer number (9950000310).

Almost surely, 2^19900000619 is an apocalyptic number.

19900000619 is a deficient number, since it is larger than the sum of its proper divisors (1).

19900000619 is an equidigital number, since it uses as much as digits as its factorization.

19900000619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The spelling of 19900000619 in words is "nineteen billion, nine hundred million, six hundred nineteen", and thus it is an aban number.