20843046251 has 2 divisors, whose sum is σ = 20843046252. Its totient is φ = 20843046250.

The previous prime is 20843046209. The next prime is 20843046293. The reversal of 20843046251 is 15264034802.

It is a balanced prime because it is at equal distance from previous prime (20843046209) and next prime (20843046293).

It is a cyclic number.

It is not a de Polignac number, because 20843046251 - 2³⁰ = 19769304427 is a prime.

It is not a weakly prime, because it can be changed into another prime (20843046451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10421523125 + 10421523126.

It is an arithmetic number, because the mean of its divisors is an integer number (10421523126).

Almost surely, 2^20843046251 is an apocalyptic number.

20843046251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20843046251 is an equidigital number, since it uses as much as digits as its factorization.

20843046251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 20843046251 in words is "twenty billion, eight hundred forty-three million, forty-six thousand, two hundred fifty-one".