20556037125 has 96 divisors (see below), whose sum is σ = 40835418624. Its totient is φ = 9884246400.

The previous prime is 20556037123. The next prime is 20556037133. The reversal of 20556037125 is 52173065502.

20556037125 is a `hidden beast` number, since 2 + 0 + 5 + 560 + 3 + 71 + 25 = 666.

It is not a de Polignac number, because 20556037125 - 2¹ = 20556037123 is a prime.

It is a super-3 number, since 3×20556037125³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20556037125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20556037123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 612532 + ... + 645218.

It is an arithmetic number, because the mean of its divisors is an integer number (425368944).

Almost surely, 2^20556037125 is an apocalyptic number.

20556037125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20556037125 is a deficient number, since it is larger than the sum of its proper divisors (20279381499).

20556037125 is a wasteful number, since it uses less digits than its factorization.

20556037125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32764 (or 32751 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The spelling of 20556037125 in words is "twenty billion, five hundred fifty-six million, thirty-seven thousand, one hundred twenty-five".