20697283 has 2 divisors, whose sum is σ = 20697284. Its totient is φ = 20697282.

The previous prime is 20697277. The next prime is 20697301. The reversal of 20697283 is 38279602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20697283 - 2¹³ = 20689091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20697203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10348641 + 10348642.

It is an arithmetic number, because the mean of its divisors is an integer number (10348642).

Almost surely, 2^20697283 is an apocalyptic number.

20697283 is a deficient number, since it is larger than the sum of its proper divisors (1).

20697283 is an equidigital number, since it uses as much as digits as its factorization.

20697283 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20697283 is about 4549.4266671747. The cubic root of 20697283 is about 274.5603244096.

The spelling of 20697283 in words is "twenty million, six hundred ninety-seven thousand, two hundred eighty-three".