21811789058 has 8 divisors (see below), whose sum is σ = 32848033680. Its totient is φ = 10862444500.

The previous prime is 21811789049. The next prime is 21811789061. The reversal of 21811789058 is 85098711812.

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 = 21811788997 and 21811789015.

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, 21724388 + ... + 21725391.

It is an arithmetic number, because the mean of its divisors is an integer number (4106004210).

Almost surely, 2^21811789058 is an apocalyptic number.

21811789058 is a deficient number, since it is larger than the sum of its proper divisors (11036244622).

21811789058 is a wasteful number, since it uses less digits than its factorization.

21811789058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43450032.

The product of its (nonzero) digits is 322560, while the sum is 50.

The spelling of 21811789058 in words is "twenty-one billion, eight hundred eleven million, seven hundred eighty-nine thousand, fifty-eight".