21589104542 has 8 divisors (see below), whose sum is σ = 34288577856. Its totient is φ = 10159578592.

The previous prime is 21589104539. The next prime is 21589104623. The reversal of 21589104542 is 24540198512.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21589104542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317486798 + ... + 317486865.

It is an arithmetic number, because the mean of its divisors is an integer number (4286072232).

Almost surely, 2^21589104542 is an apocalyptic number.

21589104542 is a deficient number, since it is larger than the sum of its proper divisors (12699473314).

21589104542 is a wasteful number, since it uses less digits than its factorization.

21589104542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634973682.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 21589104542 in words is "twenty-one billion, five hundred eighty-nine million, one hundred four thousand, five hundred forty-two".