20323018723 has 16 divisors (see below), whose sum is σ = 23330151936. Its totient is φ = 17342012160.

The previous prime is 20323018711. The next prime is 20323018733. The reversal of 20323018723 is 32781032302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20323018723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20323018733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582458 + ... + 1595248.

It is an arithmetic number, because the mean of its divisors is an integer number (1458134496).

Almost surely, 2^20323018723 is an apocalyptic number.

20323018723 is a deficient number, since it is larger than the sum of its proper divisors (3007133213).

20323018723 is a wasteful number, since it uses less digits than its factorization.

20323018723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13794.

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 20323018723 in words is "twenty billion, three hundred twenty-three million, eighteen thousand, seven hundred twenty-three".