21010250524 has 24 divisors (see below), whose sum is σ = 36876525840. Its totient is φ = 10474130304.

The previous prime is 21010250507. The next prime is 21010250531. The reversal of 21010250524 is 42505201012.

It is a junction number, because it is equal to n+sod(n) for n = 21010250495 and 21010250504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5718352 + ... + 5722024.

It is an arithmetic number, because the mean of its divisors is an integer number (1536521910).

Almost surely, 2^21010250524 is an apocalyptic number.

It is an amenable number.

21010250524 is a deficient number, since it is larger than the sum of its proper divisors (15866275316).

21010250524 is a wasteful number, since it uses less digits than its factorization.

21010250524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509 (or 7507 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 21010250524 its reverse (42505201012), we get a palindrome (63515451536).

The spelling of 21010250524 in words is "twenty-one billion, ten million, two hundred fifty thousand, five hundred twenty-four".