20263235 has 24 divisors (see below), whose sum is σ = 26598480. Its totient is φ = 14805504.

The previous prime is 20263219. The next prime is 20263237. The reversal of 20263235 is 53236202.

It is a happy number.

It is not a de Polignac number, because 20263235 - 2⁴ = 20263219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20263235.

It is not an unprimeable number, because it can be changed into a prime (20263237) 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 23 ways as a sum of consecutive naturals, for example, 53276 + ... + 53654.

It is an arithmetic number, because the mean of its divisors is an integer number (1108270).

Almost surely, 2^20263235 is an apocalyptic number.

20263235 is a deficient number, since it is larger than the sum of its proper divisors (6335245).

20263235 is a wasteful number, since it uses less digits than its factorization.

20263235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20263235 is about 4501.4703153525. The cubic root of 20263235 is about 272.6274576989.

Adding to 20263235 its reverse (53236202), we get a palindrome (73499437).

The spelling of 20263235 in words is "twenty million, two hundred sixty-three thousand, two hundred thirty-five".