20540104585 has 64 divisors (see below), whose sum is σ = 33161716224. Its totient is φ = 11795097600.

The previous prime is 20540104583. The next prime is 20540104619. The reversal of 20540104585 is 58540104502.

It is a happy number.

It is not a de Polignac number, because 20540104585 - 2¹ = 20540104583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20540104585.

It is not an unprimeable number, because it can be changed into a prime (20540104583) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2603667 + ... + 2611543.

It is an arithmetic number, because the mean of its divisors is an integer number (518151816).

Almost surely, 2^20540104585 is an apocalyptic number.

It is an amenable number.

20540104585 is a deficient number, since it is larger than the sum of its proper divisors (12621611639).

20540104585 is a wasteful number, since it uses less digits than its factorization.

20540104585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434.

The product of its (nonzero) digits is 32000, while the sum is 34.

The spelling of 20540104585 in words is "twenty billion, five hundred forty million, one hundred four thousand, five hundred eighty-five".