20253436 has 12 divisors (see below), whose sum is σ = 40506928. Its totient is φ = 8680032.

The previous prime is 20253433. The next prime is 20253439. The reversal of 20253436 is 63435202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20253433) and next prime (20253439).

20253436 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20253436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20253433) 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, 361641 + ... + 361696.

Almost surely, 2^20253436 is an apocalyptic number.

It is an amenable number.

20253436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20253436 is a wasteful number, since it uses less digits than its factorization.

20253436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723348 (or 723346 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20253436 is about 4500.3817615842. The cubic root of 20253436 is about 272.5835044143.

Adding to 20253436 its reverse (63435202), we get a palindrome (83688638).

The spelling of 20253436 in words is "twenty million, two hundred fifty-three thousand, four hundred thirty-six".