21577842085530 has 32 divisors (see below), whose sum is σ = 52194591258624. Its totient is φ = 5708783416896.

The previous prime is 21577842085529. The next prime is 21577842085549. The reversal of 21577842085530 is 3558024877512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2831733997 + ... + 2831741616.

It is an arithmetic number, because the mean of its divisors is an integer number (1631080976832).

Almost surely, 2^{21577842085530} is an apocalyptic number.

21577842085530 is an abundant number, since it is smaller than the sum of its proper divisors (30616749173094).

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

21577842085530 is a wasteful number, since it uses less digits than its factorization.

21577842085530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663475750.

The product of its (nonzero) digits is 18816000, while the sum is 57.

The spelling of 21577842085530 in words is "twenty-one trillion, five hundred seventy-seven billion, eight hundred forty-two million, eighty-five thousand, five hundred thirty".