20124444523 has 4 divisors (see below), whose sum is σ = 20193128928. Its totient is φ = 20055760120.

The previous prime is 20124444503. The next prime is 20124444539. The reversal of 20124444523 is 32544442102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20124444523 - 2²⁹ = 19587573611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124444503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34341763 + ... + 34342348.

It is an arithmetic number, because the mean of its divisors is an integer number (5048282232).

Almost surely, 2^20124444523 is an apocalyptic number.

20124444523 is a deficient number, since it is larger than the sum of its proper divisors (68684405).

20124444523 is an equidigital number, since it uses as much as digits as its factorization.

20124444523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68684404.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 20124444523 its reverse (32544442102), we get a palindrome (52668886625).

The spelling of 20124444523 in words is "twenty billion, one hundred twenty-four million, four hundred forty-four thousand, five hundred twenty-three".