20304220450 has 12 divisors (see below), whose sum is σ = 37765850130. Its totient is φ = 8121688160.

The previous prime is 20304220379. The next prime is 20304220459. The reversal of 20304220450 is 5402240302.

It can be written as a sum of positive squares in 3 ways, for example, as 18070618329 + 2233602121 = 134427^2 + 47261^2 .

It is a super-2 number, since 2×20304220450² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20304220459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203042155 + ... + 203042254.

Almost surely, 2^20304220450 is an apocalyptic number.

20304220450 is a deficient number, since it is larger than the sum of its proper divisors (17461629680).

20304220450 is a wasteful number, since it uses less digits than its factorization.

20304220450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406084421 (or 406084416 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20304220450 its reverse (5402240302), we get a palindrome (25706460752).

The spelling of 20304220450 in words is "twenty billion, three hundred four million, two hundred twenty thousand, four hundred fifty".