20465323640306 has 4 divisors (see below), whose sum is σ = 30697985460462. Its totient is φ = 10232661820152.

The previous prime is 20465323640297. The next prime is 20465323640317. The reversal of 20465323640306 is 60304632356402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12809892386281 + 7655431254025 = 3579091^2 + 2766845^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5116330910075 + ... + 5116330910078.

Almost surely, 2^{20465323640306} is an apocalyptic number.

20465323640306 is a deficient number, since it is larger than the sum of its proper divisors (10232661820156).

20465323640306 is a wasteful number, since it uses less digits than its factorization.

20465323640306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10232661820155.

The product of its (nonzero) digits is 1866240, while the sum is 44.

Adding to 20465323640306 its reverse (60304632356402), we get a palindrome (80769955996708).

The spelling of 20465323640306 in words is "twenty trillion, four hundred sixty-five billion, three hundred twenty-three million, six hundred forty thousand, three hundred six".