21526050623 has 16 divisors (see below), whose sum is σ = 26899983360. Its totient is φ = 16734602400.

The previous prime is 21526050583. The next prime is 21526050629. The reversal of 21526050623 is 32605062512.

It is a cyclic number.

It is not a de Polignac number, because 21526050623 - 2⁸ = 21526050367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21526050623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21526050629) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 291128 + ... + 357501.

It is an arithmetic number, because the mean of its divisors is an integer number (1681248960).

Almost surely, 2^21526050623 is an apocalyptic number.

21526050623 is a deficient number, since it is larger than the sum of its proper divisors (5373932737).

21526050623 is a wasteful number, since it uses less digits than its factorization.

21526050623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649078.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 21526050623 in words is "twenty-one billion, five hundred twenty-six million, fifty thousand, six hundred twenty-three".