20657383 has 2 divisors, whose sum is σ = 20657384. Its totient is φ = 20657382.

The previous prime is 20657347. The next prime is 20657401. The reversal of 20657383 is 38375602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20657383 - 2¹³ = 20649191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20657323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10328691 + 10328692.

It is an arithmetic number, because the mean of its divisors is an integer number (10328692).

Almost surely, 2^20657383 is an apocalyptic number.

20657383 is a deficient number, since it is larger than the sum of its proper divisors (1).

20657383 is an equidigital number, since it uses as much as digits as its factorization.

20657383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20657383 is about 4545.0393837678. The cubic root of 20657383 is about 274.3837794317.

The spelling of 20657383 in words is "twenty million, six hundred fifty-seven thousand, three hundred eighty-three".