20336144 has 20 divisors (see below), whose sum is σ = 39846780. Its totient is φ = 10053120.

The previous prime is 20336089. The next prime is 20336149. The reversal of 20336144 is 44163302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1081600 + 19254544 = 1040^2 + 4388^2 .

It is not an unprimeable number, because it can be changed into a prime (20336149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5717 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (1992339).

Almost surely, 2^20336144 is an apocalyptic number.

It is an amenable number.

20336144 is a deficient number, since it is larger than the sum of its proper divisors (19510636).

20336144 is a wasteful number, since it uses less digits than its factorization.

20336144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14378 (or 14372 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20336144 is about 4509.5613977415. The cubic root of 20336144 is about 272.9540459443.

Adding to 20336144 its reverse (44163302), we get a palindrome (64499446).

The spelling of 20336144 in words is "twenty million, three hundred thirty-six thousand, one hundred forty-four".