20671283 has 4 divisors (see below), whose sum is σ = 20680608. Its totient is φ = 20661960.

The previous prime is 20671279. The next prime is 20671289. The reversal of 20671283 is 38217602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20671283 - 2² = 20671279 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20671289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (5170152).

Almost surely, 2^20671283 is an apocalyptic number.

20671283 is a deficient number, since it is larger than the sum of its proper divisors (9325).

20671283 is an equidigital number, since it uses as much as digits as its factorization.

20671283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20671283 is about 4546.5682662861. The cubic root of 20671283 is about 274.4453083519.

Adding to 20671283 its reverse (38217602), we get a palindrome (58888885).

The spelling of 20671283 in words is "twenty million, six hundred seventy-one thousand, two hundred eighty-three".