19965902293 has 2 divisors, whose sum is σ = 19965902294. Its totient is φ = 19965902292.

The previous prime is 19965902291. The next prime is 19965902311. The reversal of 19965902293 is 39220956991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11325642084 + 8640260209 = 106422^2 + 92953^2 .

It is a cyclic number.

It is not a de Polignac number, because 19965902293 - 2¹ = 19965902291 is a prime.

Together with 19965902291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19965902291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9982951146 + 9982951147.

It is an arithmetic number, because the mean of its divisors is an integer number (9982951147).

Almost surely, 2^19965902293 is an apocalyptic number.

It is an amenable number.

19965902293 is a deficient number, since it is larger than the sum of its proper divisors (1).

19965902293 is an equidigital number, since it uses as much as digits as its factorization.

19965902293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The spelling of 19965902293 in words is "nineteen billion, nine hundred sixty-five million, nine hundred two thousand, two hundred ninety-three".