84585345021 has 12 divisors (see below), whose sum is σ = 125020200448. Its totient is φ = 55078829064.

The previous prime is 84585345017. The next prime is 84585345029. The reversal of 84585345021 is 12054358548.

84585345021 is a `hidden beast` number, since 8 + 4 + 585 + 3 + 45 + 0 + 21 = 666.

It is not a de Polignac number, because 84585345021 - 2² = 84585345017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84585345029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109283005 + ... + 109283778.

Almost surely, 2^84585345021 is an apocalyptic number.

It is an amenable number.

84585345021 is a deficient number, since it is larger than the sum of its proper divisors (40434855427).

84585345021 is a wasteful number, since it uses less digits than its factorization.

84585345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218566832 (or 218566829 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 84585345021 in words is "eighty-four billion, five hundred eighty-five million, three hundred forty-five thousand, twenty-one".