21013025045526 has 48 divisors (see below), whose sum is σ = 46006096432608. Its totient is φ = 6930904128000.

The previous prime is 21013025045503. The next prime is 21013025045539. The reversal of 21013025045526 is 62554052031012.

21013025045526 is a `hidden beast` number, since 2 + 1 + 0 + 130 + 2 + 50 + 455 + 26 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320370 + ... + 6490661.

It is an arithmetic number, because the mean of its divisors is an integer number (958460342346).

Almost surely, 2^{21013025045526} is an apocalyptic number.

21013025045526 is an abundant number, since it is smaller than the sum of its proper divisors (24993071387082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21013025045526 is a wasteful number, since it uses less digits than its factorization.

21013025045526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6812837 (or 6812834 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 21013025045526 its reverse (62554052031012), we get a palindrome (83567077076538).

The spelling of 21013025045526 in words is "twenty-one trillion, thirteen billion, twenty-five million, forty-five thousand, five hundred twenty-six".