82588821021 has 32 divisors (see below), whose sum is σ = 139990855680. Its totient is φ = 47140310448.

The previous prime is 82588820981. The next prime is 82588821023. The reversal of 82588821021 is 12012888528.

It is not a de Polignac number, because 82588821021 - 2⁶ = 82588820957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82588821023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78681 + ... + 413966.

It is an arithmetic number, because the mean of its divisors is an integer number (4374714240).

Almost surely, 2^82588821021 is an apocalyptic number.

It is an amenable number.

82588821021 is a deficient number, since it is larger than the sum of its proper divisors (57402034659).

82588821021 is a wasteful number, since it uses less digits than its factorization.

82588821021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493550 (or 493544 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 45.

The spelling of 82588821021 in words is "eighty-two billion, five hundred eighty-eight million, eight hundred twenty-one thousand, twenty-one".