20144504125 has 8 divisors (see below), whose sum is σ = 25140341304. Its totient is φ = 16115603200.

The previous prime is 20144504123. The next prime is 20144504141. The reversal of 20144504125 is 52140544102.

It can be written as a sum of positive squares in 4 ways, for example, as 505845081 + 19638659044 = 22491^2 + 140138^2 .

It is not a de Polignac number, because 20144504125 - 2¹ = 20144504123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20144504093 and 20144504102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144504123) 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 7 ways as a sum of consecutive naturals, for example, 80577892 + ... + 80578141.

It is an arithmetic number, because the mean of its divisors is an integer number (3142542663).

Almost surely, 2^20144504125 is an apocalyptic number.

20144504125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20144504125 is a deficient number, since it is larger than the sum of its proper divisors (4995837179).

20144504125 is an equidigital number, since it uses as much as digits as its factorization.

20144504125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161156048 (or 161156038 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 20144504125 in words is "twenty billion, one hundred forty-four million, five hundred four thousand, one hundred twenty-five".