19342220861 has 4 divisors (see below), whose sum is σ = 19344668832. Its totient is φ = 19339772892.

The previous prime is 19342220819. The next prime is 19342220869. The reversal of 19342220861 is 16802224391.

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.

It is a cyclic number.

It is not a de Polignac number, because 19342220861 - 2¹⁴ = 19342204477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19342220869) 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, 1212095 + ... + 1227948.

It is an arithmetic number, because the mean of its divisors is an integer number (4836167208).

Almost surely, 2^19342220861 is an apocalyptic number.

It is an amenable number.

19342220861 is a deficient number, since it is larger than the sum of its proper divisors (2447971).

19342220861 is an equidigital number, since it uses as much as digits as its factorization.

19342220861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447970.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 19342220861 in words is "nineteen billion, three hundred forty-two million, two hundred twenty thousand, eight hundred sixty-one".