20444320152425 has 24 divisors (see below), whose sum is σ = 27301251488280. Its totient is φ = 15097221964800.

The previous prime is 20444320152397. The next prime is 20444320152439. The reversal of 20444320152425 is 52425102344402.

It can be written as a sum of positive squares in 12 ways, for example, as 8629041375529 + 11815278776896 = 2937523^2 + 3437336^2 .

It is not a de Polignac number, because 20444320152425 - 2¹⁴ = 20444320136041 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 68569571 + ... + 68867079.

It is an arithmetic number, because the mean of its divisors is an integer number (1137552145345).

Almost surely, 2^{20444320152425} is an apocalyptic number.

20444320152425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20444320152425 is a deficient number, since it is larger than the sum of its proper divisors (6856931335855).

20444320152425 is a wasteful number, since it uses less digits than its factorization.

20444320152425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508973 (or 508968 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 20444320152425 its reverse (52425102344402), we get a palindrome (72869422496827).

The spelling of 20444320152425 in words is "twenty trillion, four hundred forty-four billion, three hundred twenty million, one hundred fifty-two thousand, four hundred twenty-five".