20426263 has 8 divisors (see below), whose sum is σ = 23997456. Its totient is φ = 17140800.

The previous prime is 20426251. The next prime is 20426267. The reversal of 20426263 is 36262402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20426263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71278 + ... + 71563.

It is an arithmetic number, because the mean of its divisors is an integer number (2999682).

Almost surely, 2^20426263 is an apocalyptic number.

20426263 is a deficient number, since it is larger than the sum of its proper divisors (3571193).

20426263 is a wasteful number, since it uses less digits than its factorization.

20426263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142865.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 20426263 is about 4519.5423440875. The cubic root of 20426263 is about 273.3566476577.

Adding to 20426263 its reverse (36262402), we get a palindrome (56688665).

The spelling of 20426263 in words is "twenty million, four hundred twenty-six thousand, two hundred sixty-three".