19495142213 has 2 divisors, whose sum is σ = 19495142214. Its totient is φ = 19495142212.

The previous prime is 19495142189. The next prime is 19495142273. The reversal of 19495142213 is 31224159491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17540883364 + 1954258849 = 132442^2 + 44207^2 .

It is a cyclic number.

It is not a de Polignac number, because 19495142213 - 2¹⁴ = 19495125829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19495142273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747571106 + 9747571107.

It is an arithmetic number, because the mean of its divisors is an integer number (9747571107).

Almost surely, 2^19495142213 is an apocalyptic number.

It is an amenable number.

19495142213 is a deficient number, since it is larger than the sum of its proper divisors (1).

19495142213 is an equidigital number, since it uses as much as digits as its factorization.

19495142213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The spelling of 19495142213 in words is "nineteen billion, four hundred ninety-five million, one hundred forty-two thousand, two hundred thirteen".