16320522021 has 8 divisors (see below), whose sum is σ = 21763102944. Its totient is φ = 10879144560.

The previous prime is 16320521983. The next prime is 16320522041. The reversal of 16320522021 is 12022502361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16320522021 - 2⁶ = 16320521957 is a prime.

It is a super-3 number, since 3×16320522021³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16320521982 and 16320522000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320522041) 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 7 ways as a sum of consecutive naturals, for example, 268731 + ... + 323816.

It is an arithmetic number, because the mean of its divisors is an integer number (2720387868).

Almost surely, 2^16320522021 is an apocalyptic number.

It is an amenable number.

16320522021 is a deficient number, since it is larger than the sum of its proper divisors (5442580923).

16320522021 is an equidigital number, since it uses as much as digits as its factorization.

16320522021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601731.

The product of its (nonzero) digits is 1440, while the sum is 24.

The spelling of 16320522021 in words is "sixteen billion, three hundred twenty million, five hundred twenty-two thousand, twenty-one".