20520012375 has 48 divisors (see below), whose sum is σ = 37075896000. Its totient is φ = 10918814400.

The previous prime is 20520012371. The next prime is 20520012377. The reversal of 20520012375 is 57321002502.

It is not a de Polignac number, because 20520012375 - 2² = 20520012371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520012371) 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 in 47 ways as a sum of consecutive naturals, for example, 473101 + ... + 514649.

It is an arithmetic number, because the mean of its divisors is an integer number (772414500).

Almost surely, 2^20520012375 is an apocalyptic number.

20520012375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20520012375 is a deficient number, since it is larger than the sum of its proper divisors (16555883625).

20520012375 is a wasteful number, since it uses less digits than its factorization.

20520012375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42009 (or 41996 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

Adding to 20520012375 its reverse (57321002502), we get a palindrome (77841014877).

The spelling of 20520012375 in words is "twenty billion, five hundred twenty million, twelve thousand, three hundred seventy-five".