20323166646 has 32 divisors (see below), whose sum is σ = 41261875200. Its totient is φ = 6672219840.

The previous prime is 20323166627. The next prime is 20323166653. The reversal of 20323166646 is 64666132302.

It is a super-2 number, since 2×20323166646² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141451 + ... + 246281.

It is an arithmetic number, because the mean of its divisors is an integer number (1289433600).

Almost surely, 2^20323166646 is an apocalyptic number.

20323166646 is an abundant number, since it is smaller than the sum of its proper divisors (20938708554).

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

20323166646 is a wasteful number, since it uses less digits than its factorization.

20323166646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105324.

The product of its (nonzero) digits is 186624, while the sum is 39.

Adding to 20323166646 its reverse (64666132302), we get a palindrome (84989298948).

The spelling of 20323166646 in words is "twenty billion, three hundred twenty-three million, one hundred sixty-six thousand, six hundred forty-six".