21793283 has 2 divisors, whose sum is σ = 21793284. Its totient is φ = 21793282.

The previous prime is 21793253. The next prime is 21793301. The reversal of 21793283 is 38239712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21793283 - 2¹⁴ = 21776899 is a prime.

It is not a weakly prime, because it can be changed into another prime (21793223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10896641 + 10896642.

It is an arithmetic number, because the mean of its divisors is an integer number (10896642).

Almost surely, 2^21793283 is an apocalyptic number.

21793283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21793283 is an equidigital number, since it uses as much as digits as its factorization.

21793283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 21793283 is about 4668.3276448853. The cubic root of 21793283 is about 279.3235499080.

The spelling of 21793283 in words is "twenty-one million, seven hundred ninety-three thousand, two hundred eighty-three".