16442020000421 has 4 divisors (see below), whose sum is σ = 16444472941632. Its totient is φ = 16439567059212.

The previous prime is 16442020000403. The next prime is 16442020000429. The reversal of 16442020000421 is 12400002024461.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16442020000421 is a prime.

It is a super-3 number, since 3×16442020000421³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442020000429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226460551 + ... + 1226473956.

It is an arithmetic number, because the mean of its divisors is an integer number (4111118235408).

Almost surely, 2^{16442020000421} is an apocalyptic number.

It is an amenable number.

16442020000421 is a deficient number, since it is larger than the sum of its proper divisors (2452941211).

16442020000421 is an equidigital number, since it uses as much as digits as its factorization.

16442020000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452941210.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 16442020000421 its reverse (12400002024461), we get a palindrome (28842022024882).

The spelling of 16442020000421 in words is "sixteen trillion, four hundred forty-two billion, twenty million, four hundred twenty-one", and thus it is an aban number.