21834793 has 2 divisors, whose sum is σ = 21834794. Its totient is φ = 21834792.

The previous prime is 21834737. The next prime is 21834803. The reversal of 21834793 is 39743812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12299049 + 9535744 = 3507^2 + 3088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21834793 is a prime.

It is not a weakly prime, because it can be changed into another prime (21834713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10917396 + 10917397.

It is an arithmetic number, because the mean of its divisors is an integer number (10917397).

Almost surely, 2^21834793 is an apocalyptic number.

It is an amenable number.

21834793 is a deficient number, since it is larger than the sum of its proper divisors (1).

21834793 is an equidigital number, since it uses as much as digits as its factorization.

21834793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 21834793 is about 4672.7714474389. The cubic root of 21834793 is about 279.5007813787.

The spelling of 21834793 in words is "twenty-one million, eight hundred thirty-four thousand, seven hundred ninety-three".