20145540223 has 2 divisors, whose sum is σ = 20145540224. Its totient is φ = 20145540222.

The previous prime is 20145540211. The next prime is 20145540253. The reversal of 20145540223 is 32204554102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20145540223 - 2²⁵ = 20111985791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20145540191 and 20145540200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20145540203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072770111 + 10072770112.

It is an arithmetic number, because the mean of its divisors is an integer number (10072770112).

Almost surely, 2^20145540223 is an apocalyptic number.

20145540223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20145540223 is an equidigital number, since it uses as much as digits as its factorization.

20145540223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 20145540223 in words is "twenty billion, one hundred forty-five million, five hundred forty thousand, two hundred twenty-three".