20612421306 has 24 divisors (see below), whose sum is σ = 45392383764. Its totient is φ = 6758170560.

The previous prime is 20612421299. The next prime is 20612421329. The reversal of 20612421306 is 60312421602.

20612421306 is a `hidden beast` number, since 2 + 0 + 612 + 42 + 1 + 3 + 0 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20430414225 + 182007081 = 142935^2 + 13491^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20612421306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9385251 + ... + 9387446.

Almost surely, 2^20612421306 is an apocalyptic number.

20612421306 is an abundant number, since it is smaller than the sum of its proper divisors (24779962458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20612421306 is a wasteful number, since it uses less digits than its factorization.

20612421306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772766 (or 18772763 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 20612421306 its reverse (60312421602), we get a palindrome (80924842908).

The spelling of 20612421306 in words is "twenty billion, six hundred twelve million, four hundred twenty-one thousand, three hundred six".