20323643823 has 30 divisors (see below), whose sum is σ = 34702951976. Its totient is φ = 11611570968.

The previous prime is 20323643783. The next prime is 20323643831. The reversal of 20323643823 is 32834632302.

20323643823 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 3 + 643 + 8 + 2 + 3 = 666.

It is not a de Polignac number, because 20323643823 - 2¹⁸ = 20323381679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323643623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3391636 + ... + 3397622.

Almost surely, 2^20323643823 is an apocalyptic number.

20323643823 is a deficient number, since it is larger than the sum of its proper divisors (14379308153).

20323643823 is an frugal number, since it uses more digits than its factorization.

20323643823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11993 (or 5997 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 20323643823 in words is "twenty billion, three hundred twenty-three million, six hundred forty-three thousand, eight hundred twenty-three".