16621530083 has 4 divisors (see below), whose sum is σ = 17344205328. Its totient is φ = 15898854840.

The previous prime is 16621530031. The next prime is 16621530097. The reversal of 16621530083 is 38003512661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16621530083 - 2¹⁰ = 16621529059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16621530883) 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, 361337588 + ... + 361337633.

It is an arithmetic number, because the mean of its divisors is an integer number (4336051332).

Almost surely, 2^16621530083 is an apocalyptic number.

16621530083 is a deficient number, since it is larger than the sum of its proper divisors (722675245).

16621530083 is an equidigital number, since it uses as much as digits as its factorization.

16621530083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722675244.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 16621530083 in words is "sixteen billion, six hundred twenty-one million, five hundred thirty thousand, eighty-three".