21013575583 has 64 divisors (see below), whose sum is σ = 29611008000. Its totient is φ = 14373912960.

The previous prime is 21013575581. The next prime is 21013575593. The reversal of 21013575583 is 38557531012.

It is not a de Polignac number, because 21013575583 - 2¹ = 21013575581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013575581) 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 63 ways as a sum of consecutive naturals, for example, 4118568 + ... + 4123666.

It is an arithmetic number, because the mean of its divisors is an integer number (462672000).

Almost surely, 2^21013575583 is an apocalyptic number.

21013575583 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21013575583 is a deficient number, since it is larger than the sum of its proper divisors (8597432417).

21013575583 is a wasteful number, since it uses less digits than its factorization.

21013575583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 21013575583 in words is "twenty-one billion, thirteen million, five hundred seventy-five thousand, five hundred eighty-three".