20005440212 has 12 divisors (see below), whose sum is σ = 35025736116. Its totient is φ = 9998087040.

The previous prime is 20005440197. The next prime is 20005440239. The reversal of 20005440212 is 21204450002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11899319056 + 8106121156 = 109084^2 + 90034^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148543 + ... + 1165830.

It is an arithmetic number, because the mean of its divisors is an integer number (2918811343).

Almost surely, 2^20005440212 is an apocalyptic number.

It is an amenable number.

20005440212 is a deficient number, since it is larger than the sum of its proper divisors (15020295904).

20005440212 is a wasteful number, since it uses less digits than its factorization.

20005440212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316538 (or 2316536 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20005440212 its reverse (21204450002), we get a palindrome (41209890214).

The spelling of 20005440212 in words is "twenty billion, five million, four hundred forty thousand, two hundred twelve".