20033323144 has 8 divisors (see below), whose sum is σ = 37562480910. Its totient is φ = 10016661568.

The previous prime is 20033323139. The next prime is 20033323147. The reversal of 20033323144 is 44132333002.

It can be written as a sum of positive squares in only one way, i.e., 16571412900 + 3461910244 = 128730^2 + 58838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20033323147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252082689 + ... + 1252082704.

Almost surely, 2^20033323144 is an apocalyptic number.

It is an amenable number.

20033323144 is a deficient number, since it is larger than the sum of its proper divisors (17529157766).

20033323144 is a wasteful number, since it uses less digits than its factorization.

20033323144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504165399 (or 2504165395 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 20033323144 its reverse (44132333002), we get a palindrome (64165656146).

The spelling of 20033323144 in words is "twenty billion, thirty-three million, three hundred twenty-three thousand, one hundred forty-four".