21586675042 has 8 divisors (see below), whose sum is σ = 32518983276. Its totient is φ = 10747013952.

The previous prime is 21586675039. The next prime is 21586675043. The reversal of 21586675042 is 24057668512.

It can be written as a sum of positive squares in 2 ways, for example, as 19287376641 + 2299298401 = 138879^2 + 47951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21586674983 and 21586675001.

It is not an unprimeable number, because it can be changed into a prime (21586675043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23161203 + ... + 23162134.

Almost surely, 2^21586675042 is an apocalyptic number.

21586675042 is a deficient number, since it is larger than the sum of its proper divisors (10932308234).

21586675042 is a wasteful number, since it uses less digits than its factorization.

21586675042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46323572.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 21586675042 in words is "twenty-one billion, five hundred eighty-six million, six hundred seventy-five thousand, forty-two".