21839110253 has 2 divisors, whose sum is σ = 21839110254. Its totient is φ = 21839110252.

The previous prime is 21839110247. The next prime is 21839110277. The reversal of 21839110253 is 35201193812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14301050569 + 7538059684 = 119587^2 + 86822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21839110253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21839110453) 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 as a sum of consecutive naturals, namely, 10919555126 + 10919555127.

It is an arithmetic number, because the mean of its divisors is an integer number (10919555127).

Almost surely, 2^21839110253 is an apocalyptic number.

It is an amenable number.

21839110253 is a deficient number, since it is larger than the sum of its proper divisors (1).

21839110253 is an equidigital number, since it uses as much as digits as its factorization.

21839110253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 21839110253 in words is "twenty-one billion, eight hundred thirty-nine million, one hundred ten thousand, two hundred fifty-three".