21660058234 has 8 divisors (see below), whose sum is σ = 32515141428. Its totient is φ = 10821677760.

The previous prime is 21660058219. The next prime is 21660058237. The reversal of 21660058234 is 43285006612.

It can be written as a sum of positive squares in 2 ways, for example, as 15122850625 + 6537207609 = 122975^2 + 80853^2 .

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 = 21660058193 and 21660058202.

It is not an unprimeable number, because it can be changed into a prime (21660058237) 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, 4172437 + ... + 4177624.

Almost surely, 2^21660058234 is an apocalyptic number.

21660058234 is a deficient number, since it is larger than the sum of its proper divisors (10855083194).

21660058234 is a wasteful number, since it uses less digits than its factorization.

21660058234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351360.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21660058234 in words is "twenty-one billion, six hundred sixty million, fifty-eight thousand, two hundred thirty-four".