20240723 has 2 divisors, whose sum is σ = 20240724. Its totient is φ = 20240722.

The previous prime is 20240683. The next prime is 20240729. The reversal of 20240723 is 32704202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20240723 - 2¹⁰ = 20239699 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20240695 and 20240704.

It is not a weakly prime, because it can be changed into another prime (20240729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10120361 + 10120362.

It is an arithmetic number, because the mean of its divisors is an integer number (10120362).

Almost surely, 2^20240723 is an apocalyptic number.

20240723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20240723 is an equidigital number, since it uses as much as digits as its factorization.

20240723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20240723 is about 4498.9691041393. The cubic root of 20240723 is about 272.5264592886.

Subtracting from 20240723 its sum of digits (20), we obtain a triangular number (20240703 = T₆₃₆₂).

Adding to 20240723 its reverse (32704202), we get a palindrome (52944925).

The spelling of 20240723 in words is "twenty million, two hundred forty thousand, seven hundred twenty-three".