20540558570925 has 12 divisors (see below), whose sum is σ = 33960390170720. Its totient is φ = 10954964571120.

The previous prime is 20540558570897. The next prime is 20540558570933. The reversal of 20540558570925 is 52907585504502.

It is not a de Polignac number, because 20540558570925 - 2¹⁰ = 20540558569901 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136937057065 + ... + 136937057214.

Almost surely, 2^{20540558570925} is an apocalyptic number.

20540558570925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20540558570925 is a deficient number, since it is larger than the sum of its proper divisors (13419831599795).

20540558570925 is a wasteful number, since it uses less digits than its factorization.

20540558570925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273874114292 (or 273874114287 counting only the distinct ones).

The product of its (nonzero) digits is 25200000, while the sum is 57.

The spelling of 20540558570925 in words is "twenty trillion, five hundred forty billion, five hundred fifty-eight million, five hundred seventy thousand, nine hundred twenty-five".