19411982809 has 2 divisors, whose sum is σ = 19411982810. Its totient is φ = 19411982808.

The previous prime is 19411982801. The next prime is 19411982869. The reversal of 19411982809 is 90828911491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17030250000 + 2381732809 = 130500^2 + 48803^2 .

It is a cyclic number.

It is not a de Polignac number, because 19411982809 - 2³ = 19411982801 is a prime.

It is a super-3 number, since 3×19411982809³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (19411982801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9705991404 + 9705991405.

It is an arithmetic number, because the mean of its divisors is an integer number (9705991405).

Almost surely, 2^19411982809 is an apocalyptic number.

It is an amenable number.

19411982809 is a deficient number, since it is larger than the sum of its proper divisors (1).

19411982809 is an equidigital number, since it uses as much as digits as its factorization.

19411982809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 52.

The spelling of 19411982809 in words is "nineteen billion, four hundred eleven million, nine hundred eighty-two thousand, eight hundred nine".