21124059525 has 144 divisors (see below), whose sum is σ = 41017454080. Its totient is φ = 10647417600.

The previous prime is 21124059521. The next prime is 21124059527. The reversal of 21124059525 is 52595042112.

21124059525 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 40 + 595 + 25 = 666.

It is not a de Polignac number, because 21124059525 - 2² = 21124059521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21124059525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124059521) 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 143 ways as a sum of consecutive naturals, for example, 46223097 + ... + 46223553.

Almost surely, 2^21124059525 is an apocalyptic number.

21124059525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21124059525 is a deficient number, since it is larger than the sum of its proper divisors (19893394555).

21124059525 is a wasteful number, since it uses less digits than its factorization.

21124059525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 21124059525 in words is "twenty-one billion, one hundred twenty-four million, fifty-nine thousand, five hundred twenty-five".