20020263 has 4 divisors (see below), whose sum is σ = 26693688. Its totient is φ = 13346840.

The previous prime is 20020223. The next prime is 20020267. The reversal of 20020263 is 36202002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20020263 - 2⁶ = 20020199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336708 + ... + 3336713.

It is an arithmetic number, because the mean of its divisors is an integer number (6673422).

Almost surely, 2^20020263 is an apocalyptic number.

20020263 is a deficient number, since it is larger than the sum of its proper divisors (6673425).

20020263 is an equidigital number, since it uses as much as digits as its factorization.

20020263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673424.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20020263 is about 4474.4008537457. The cubic root of 20020263 is about 271.5334011252.

Adding to 20020263 its reverse (36202002), we get a palindrome (56222265).

The spelling of 20020263 in words is "twenty million, twenty thousand, two hundred sixty-three".