20263313 has 6 divisors (see below), whose sum is σ = 23571666. Its totient is φ = 17368512.

The previous prime is 20263301. The next prime is 20263319. The reversal of 20263313 is 31336202.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 753424 = 4417^2 + 868^2 .

It is not a de Polignac number, because 20263313 - 2⁶ = 20263249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20263319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206720 + ... + 206817.

It is an arithmetic number, because the mean of its divisors is an integer number (3928611).

Almost surely, 2^20263313 is an apocalyptic number.

It is an amenable number.

20263313 is a deficient number, since it is larger than the sum of its proper divisors (3308353).

20263313 is an equidigital number, since it uses as much as digits as its factorization.

20263313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413551 (or 413544 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20263313 is about 4501.4789791801. The cubic root of 20263313 is about 272.6278075100.

Adding to 20263313 its reverse (31336202), we get a palindrome (51599515).

The spelling of 20263313 in words is "twenty million, two hundred sixty-three thousand, three hundred thirteen".