20306323512 has 40 divisors (see below), whose sum is σ = 56876509800. Its totient is φ = 6768774288.

The previous prime is 20306323507. The next prime is 20306323517. The reversal of 20306323512 is 21532360302.

20306323512 is a `hidden beast` number, since 2 + 0 + 306 + 3 + 2 + 351 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (20306323507) and next prime (20306323517).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306323517) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 15667812 + ... + 15669107.

It is an arithmetic number, because the mean of its divisors is an integer number (1421912745).

Almost surely, 2^20306323512 is an apocalyptic number.

It is an amenable number.

20306323512 is an abundant number, since it is smaller than the sum of its proper divisors (36570186288).

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

20306323512 is a wasteful number, since it uses less digits than its factorization.

20306323512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31336937 (or 31336924 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 20306323512 its reverse (21532360302), we get a palindrome (41838683814).

The spelling of 20306323512 in words is "twenty billion, three hundred six million, three hundred twenty-three thousand, five hundred twelve".