20430340202 has 8 divisors (see below), whose sum is σ = 31065312036. Its totient is φ = 10075236192.

The previous prime is 20430340171. The next prime is 20430340219. The reversal of 20430340202 is 20204303402.

It can be written as a sum of positive squares in 2 ways, for example, as 19231865041 + 1198475161 = 138679^2 + 34619^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 69966773 + ... + 69967064.

Almost surely, 2^20430340202 is an apocalyptic number.

20430340202 is a deficient number, since it is larger than the sum of its proper divisors (10634971834).

20430340202 is a wasteful number, since it uses less digits than its factorization.

20430340202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139933912.

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20430340202 its reverse (20204303402), we get a palindrome (40634643604).

The spelling of 20430340202 in words is "twenty billion, four hundred thirty million, three hundred forty thousand, two hundred two".