20604131544375 has 100 divisors (see below), whose sum is σ = 38474078728800. Its totient is φ = 10985262768000.

The previous prime is 20604131544349. The next prime is 20604131544389. The reversal of 20604131544375 is 57344513140602.

20604131544375 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 4 + 1 + 31 + 544 + 3 + 75 = 666.

It is not a de Polignac number, because 20604131544375 - 2¹⁰ = 20604131543351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20604131544375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 157834131 + ... + 157964619.

It is an arithmetic number, because the mean of its divisors is an integer number (384740787288).

Almost surely, 2^{20604131544375} is an apocalyptic number.

20604131544375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20604131544375 is a deficient number, since it is larger than the sum of its proper divisors (17869947184425).

20604131544375 is an equidigital number, since it uses as much as digits as its factorization.

20604131544375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133640 (or 133616 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

Adding to 20604131544375 its reverse (57344513140602), we get a palindrome (77948644684977).

The spelling of 20604131544375 in words is "twenty trillion, six hundred four billion, one hundred thirty-one million, five hundred forty-four thousand, three hundred seventy-five".