20023144 has 16 divisors (see below), whose sum is σ = 39752100. Its totient is φ = 9422592.

The previous prime is 20023141. The next prime is 20023147. The reversal of 20023144 is 44132002.

It is an interprime number because it is at equal distance from previous prime (20023141) and next prime (20023147).

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 1790244 = 4270^2 + 1338^2 .

It is not an unprimeable number, because it can be changed into a prime (20023141) 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 3 ways as a sum of consecutive naturals, for example, 73479 + ... + 73750.

Almost surely, 2^20023144 is an apocalyptic number.

It is an amenable number.

20023144 is a deficient number, since it is larger than the sum of its proper divisors (19728956).

20023144 is a wasteful number, since it uses less digits than its factorization.

20023144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147252 (or 147248 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20023144 is about 4474.7227847097. The cubic root of 20023144 is about 271.5464254331.

Adding to 20023144 its reverse (44132002), we get a palindrome (64155146).

The spelling of 20023144 in words is "twenty million, twenty-three thousand, one hundred forty-four".