20605144330 has 32 divisors (see below), whose sum is σ = 37788162768. Its totient is φ = 8088192000.

The previous prime is 20605144309. The next prime is 20605144331. The reversal of 20605144330 is 3344150602.

It can be written as a sum of positive squares in 8 ways, for example, as 4529693809 + 16075450521 = 67303^2 + 126789^2 .

It is a super-2 number, since 2×20605144330² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20605144331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23860 + ... + 204400.

Almost surely, 2^20605144330 is an apocalyptic number.

20605144330 is a deficient number, since it is larger than the sum of its proper divisors (17183018438).

20605144330 is a wasteful number, since it uses less digits than its factorization.

20605144330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180762.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20605144330 its reverse (3344150602), we get a palindrome (23949294932).

The spelling of 20605144330 in words is "twenty billion, six hundred five million, one hundred forty-four thousand, three hundred thirty".