19468965861 has 6 divisors (see below), whose sum is σ = 28121839590. Its totient is φ = 12979310568.

The previous prime is 19468965853. The next prime is 19468965869. The reversal of 19468965861 is 16856986491.

19468965861 is a `hidden beast` number, since 1 + 9 + 46 + 8 + 9 + 6 + 586 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (19468965853) and next prime (19468965869).

It can be written as a sum of positive squares in only one way, i.e., 18587232225 + 881733636 = 136335^2 + 29694^2 .

It is not a de Polignac number, because 19468965861 - 2³ = 19468965853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19468965869) 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 5 ways as a sum of consecutive naturals, for example, 1081609206 + ... + 1081609223.

It is an arithmetic number, because the mean of its divisors is an integer number (4686973265).

Almost surely, 2^19468965861 is an apocalyptic number.

It is an amenable number.

19468965861 is a deficient number, since it is larger than the sum of its proper divisors (8652873729).

19468965861 is a wasteful number, since it uses less digits than its factorization.

19468965861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163218435 (or 2163218432 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 19468965861 in words is "nineteen billion, four hundred sixty-eight million, nine hundred sixty-five thousand, eight hundred sixty-one".