20042263 has 2 divisors, whose sum is σ = 20042264. Its totient is φ = 20042262.

The previous prime is 20042261. The next prime is 20042273. The reversal of 20042263 is 36224002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20042263 - 2¹ = 20042261 is a prime.

It is a super-2 number, since 2×20042263² = 803384612322338, which contains 22 as substring.

Together with 20042261, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20042263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20042261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021131 + 10021132.

It is an arithmetic number, because the mean of its divisors is an integer number (10021132).

Almost surely, 2^20042263 is an apocalyptic number.

20042263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042263 is an equidigital number, since it uses as much as digits as its factorization.

20042263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20042263 is about 4476.8586084441. The cubic root of 20042263 is about 271.6328261928.

Adding to 20042263 its reverse (36224002), we get a palindrome (56266265).

The spelling of 20042263 in words is "twenty million, forty-two thousand, two hundred sixty-three".