20236144 has 40 divisors (see below), whose sum is σ = 40810880. Its totient is φ = 9713088.

The previous prime is 20236141. The next prime is 20236157. The reversal of 20236144 is 44163202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236141) 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, 45877 + ... + 46315.

It is an arithmetic number, because the mean of its divisors is an integer number (1020272).

Almost surely, 2^20236144 is an apocalyptic number.

It is an amenable number.

20236144 is an abundant number, since it is smaller than the sum of its proper divisors (20574736).

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

20236144 is a wasteful number, since it uses less digits than its factorization.

20236144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20236144 is about 4498.4601809953. The cubic root of 20236144 is about 272.5059067822.

Adding to 20236144 its reverse (44163202), we get a palindrome (64399346).

The spelling of 20236144 in words is "twenty million, two hundred thirty-six thousand, one hundred forty-four".