20400200323 has 2 divisors, whose sum is σ = 20400200324. Its totient is φ = 20400200322.

The previous prime is 20400200299. The next prime is 20400200341. The reversal of 20400200323 is 32300200402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20400200323 - 2²⁵ = 20366645891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20400200297 and 20400200306.

It is not a weakly prime, because it can be changed into another prime (20400200123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200100161 + 10200100162.

It is an arithmetic number, because the mean of its divisors is an integer number (10200100162).

Almost surely, 2^20400200323 is an apocalyptic number.

20400200323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400200323 is an equidigital number, since it uses as much as digits as its factorization.

20400200323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 16.

Adding to 20400200323 its reverse (32300200402), we get a palindrome (52700400725).

The spelling of 20400200323 in words is "twenty billion, four hundred million, two hundred thousand, three hundred twenty-three".