20857483 has 2 divisors, whose sum is σ = 20857484. Its totient is φ = 20857482.

The previous prime is 20857469. The next prime is 20857511. The reversal of 20857483 is 38475802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20857483 - 2⁹ = 20856971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20857183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10428741 + 10428742.

It is an arithmetic number, because the mean of its divisors is an integer number (10428742).

Almost surely, 2^20857483 is an apocalyptic number.

20857483 is a deficient number, since it is larger than the sum of its proper divisors (1).

20857483 is an equidigital number, since it uses as much as digits as its factorization.

20857483 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20857483 is about 4566.9993431136. Note that the first 3 decimals coincide. The cubic root of 20857483 is about 275.2668836092.

The spelling of 20857483 in words is "twenty million, eight hundred fifty-seven thousand, four hundred eighty-three".