20550011525 has 12 divisors (see below), whose sum is σ = 25729415712. Its totient is φ = 16280395440.

The previous prime is 20550011509. The next prime is 20550011611. The reversal of 20550011525 is 52511005502.

It is not a de Polignac number, because 20550011525 - 2⁴ = 20550011509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20550011494 and 20550011503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3987719 + ... + 3992868.

It is an arithmetic number, because the mean of its divisors is an integer number (2144117976).

Almost surely, 2^20550011525 is an apocalyptic number.

20550011525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20550011525 is a deficient number, since it is larger than the sum of its proper divisors (5179404187).

20550011525 is a wasteful number, since it uses less digits than its factorization.

20550011525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980700 (or 7980695 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The spelling of 20550011525 in words is "twenty billion, five hundred fifty million, eleven thousand, five hundred twenty-five".