16831835021 has 4 divisors (see below), whose sum is σ = 16834256544. Its totient is φ = 16829413500.

The previous prime is 16831834991. The next prime is 16831835107. The reversal of 16831835021 is 12053813861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12053813861 = 37 ⋅325778753.

It is a cyclic number.

It is not a de Polignac number, because 16831835021 - 2¹⁴ = 16831818637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16831835621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200305 + ... + 1214246.

It is an arithmetic number, because the mean of its divisors is an integer number (4208564136).

Almost surely, 2^16831835021 is an apocalyptic number.

It is an amenable number.

16831835021 is a deficient number, since it is larger than the sum of its proper divisors (2421523).

16831835021 is an equidigital number, since it uses as much as digits as its factorization.

16831835021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421522.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 16831835021 in words is "sixteen billion, eight hundred thirty-one million, eight hundred thirty-five thousand, twenty-one".