21846793 has 2 divisors, whose sum is σ = 21846794. Its totient is φ = 21846792.

The previous prime is 21846791. The next prime is 21846821. The reversal of 21846793 is 39764812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 2732409 = 4372^2 + 1653^2 .

It is a cyclic number.

It is not a de Polignac number, because 21846793 - 2¹ = 21846791 is a prime.

Together with 21846791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21846791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10923396 + 10923397.

It is an arithmetic number, because the mean of its divisors is an integer number (10923397).

Almost surely, 2^21846793 is an apocalyptic number.

It is an amenable number.

21846793 is a deficient number, since it is larger than the sum of its proper divisors (1).

21846793 is an equidigital number, since it uses as much as digits as its factorization.

21846793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 21846793 is about 4674.0553056206. The cubic root of 21846793 is about 279.5519748283.

The spelling of 21846793 in words is "twenty-one million, eight hundred forty-six thousand, seven hundred ninety-three".