21859405527004 has 12 divisors (see below), whose sum is σ = 38254143737824. Its totient is φ = 10929650173344.

The previous prime is 21859405526983. The next prime is 21859405527007. The reversal of 21859405527004 is 40072550495812.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21859405527007) 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, 12204804 + ... + 13880779.

Almost surely, 2^{21859405527004} is an apocalyptic number.

It is an amenable number.

21859405527004 is a deficient number, since it is larger than the sum of its proper divisors (16394738210820).

21859405527004 is a wasteful number, since it uses less digits than its factorization.

21859405527004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26295084 (or 26295082 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The spelling of 21859405527004 in words is "twenty-one trillion, eight hundred fifty-nine billion, four hundred five million, five hundred twenty-seven thousand, four".