21830683506 has 16 divisors (see below), whose sum is σ = 43913746944. Its totient is φ = 7234831184.

The previous prime is 21830683487. The next prime is 21830683529. The reversal of 21830683506 is 60538603812.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10514706 + ... + 10516781.

It is an arithmetic number, because the mean of its divisors is an integer number (2744609184).

Almost surely, 2^21830683506 is an apocalyptic number.

21830683506 is an abundant number, since it is smaller than the sum of its proper divisors (22083063438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21830683506 is a wasteful number, since it uses less digits than its factorization.

21830683506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21031665.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 21830683506 in words is "twenty-one billion, eight hundred thirty million, six hundred eighty-three thousand, five hundred six".