20324515668 has 12 divisors (see below), whose sum is σ = 47423869920. Its totient is φ = 6774838552.

The previous prime is 20324515667. The next prime is 20324515697. The reversal of 20324515668 is 86651542302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20324515661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846854808 + ... + 846854831.

It is an arithmetic number, because the mean of its divisors is an integer number (3951989160).

Almost surely, 2^20324515668 is an apocalyptic number.

It is an amenable number.

20324515668 is an abundant number, since it is smaller than the sum of its proper divisors (27099354252).

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

20324515668 is a wasteful number, since it uses less digits than its factorization.

20324515668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693709646 (or 1693709644 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 20324515668 in words is "twenty billion, three hundred twenty-four million, five hundred fifteen thousand, six hundred sixty-eight".