82087540220 has 24 divisors (see below), whose sum is σ = 197010096864. Its totient is φ = 28144299456.

The previous prime is 82087540193. The next prime is 82087540231. The reversal of 82087540220 is 2204578028.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293169647 + ... + 293169926.

It is an arithmetic number, because the mean of its divisors is an integer number (8208754036).

Almost surely, 2^82087540220 is an apocalyptic number.

It is an amenable number.

82087540220 is an abundant number, since it is smaller than the sum of its proper divisors (114922556644).

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

82087540220 is a wasteful number, since it uses less digits than its factorization.

82087540220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586339589 (or 586339587 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The spelling of 82087540220 in words is "eighty-two billion, eighty-seven million, five hundred forty thousand, two hundred twenty".