21025060052 has 12 divisors (see below), whose sum is σ = 38730373920. Its totient is φ = 9959238936.

The previous prime is 21025060051. The next prime is 21025060057. The reversal of 21025060052 is 25006052012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21025060051) 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 3 ways as a sum of consecutive naturals, for example, 138322688 + ... + 138322839.

It is an arithmetic number, because the mean of its divisors is an integer number (3227531160).

Almost surely, 2^21025060052 is an apocalyptic number.

It is an amenable number.

21025060052 is a deficient number, since it is larger than the sum of its proper divisors (17705313868).

21025060052 is a wasteful number, since it uses less digits than its factorization.

21025060052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276645550 (or 276645548 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21025060052 in words is "twenty-one billion, twenty-five million, sixty thousand, fifty-two".