20263361 has 4 divisors (see below), whose sum is σ = 20340672. Its totient is φ = 20186052.

The previous prime is 20263351. The next prime is 20263379. The reversal of 20263361 is 16336202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16336202 = 2 ⋅8168101.

It is a cyclic number.

It is not a de Polignac number, because 20263361 - 2¹⁴ = 20246977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20263301) 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 3 ways as a sum of consecutive naturals, for example, 38261 + ... + 38786.

It is an arithmetic number, because the mean of its divisors is an integer number (5085168).

Almost surely, 2^20263361 is an apocalyptic number.

It is an amenable number.

20263361 is a deficient number, since it is larger than the sum of its proper divisors (77311).

20263361 is an equidigital number, since it uses as much as digits as its factorization.

20263361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77310.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20263361 is about 4501.4843107580. The cubic root of 20263361 is about 272.6280227779.

Adding to 20263361 its reverse (16336202), we get a palindrome (36599563).

The spelling of 20263361 in words is "twenty million, two hundred sixty-three thousand, three hundred sixty-one".