20440375723 has 2 divisors, whose sum is σ = 20440375724. Its totient is φ = 20440375722.

The previous prime is 20440375699. The next prime is 20440375771. The reversal of 20440375723 is 32757304402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20440375723 - 2⁹ = 20440375211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20440375783) 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, 10220187861 + 10220187862.

It is an arithmetic number, because the mean of its divisors is an integer number (10220187862).

Almost surely, 2^20440375723 is an apocalyptic number.

20440375723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440375723 is an equidigital number, since it uses as much as digits as its factorization.

20440375723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 37.

It can be divided in two parts, 204403 and 75723, that added together give a triangular number (280126 = T₇₄₈).

The spelling of 20440375723 in words is "twenty billion, four hundred forty million, three hundred seventy-five thousand, seven hundred twenty-three".