16022403021 has 4 divisors (see below), whose sum is σ = 21363204032. Its totient is φ = 10681602012.

The previous prime is 16022402999. The next prime is 16022403031. The reversal of 16022403021 is 12030422061.

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.

It is not a de Polignac number, because 16022403021 - 2¹⁴ = 16022386637 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 (16022403031) 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, 2670400501 + ... + 2670400506.

It is an arithmetic number, because the mean of its divisors is an integer number (5340801008).

Almost surely, 2^16022403021 is an apocalyptic number.

It is an amenable number.

16022403021 is a deficient number, since it is larger than the sum of its proper divisors (5340801011).

16022403021 is an equidigital number, since it uses as much as digits as its factorization.

16022403021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5340801010.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 16022403021 its reverse (12030422061), we get a palindrome (28052825082).

The spelling of 16022403021 in words is "sixteen billion, twenty-two million, four hundred three thousand, twenty-one".