16005014421 has 16 divisors (see below), whose sum is σ = 24082781760. Its totient is φ = 9365525120.

The previous prime is 16005014411. The next prime is 16005014437. The reversal of 16005014421 is 12441050061.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16005014421 - 2¹³ = 16005006229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16005014391 and 16005014400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16005014411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8361120 + ... + 8363033.

It is an arithmetic number, because the mean of its divisors is an integer number (1505173860).

Almost surely, 2^16005014421 is an apocalyptic number.

16005014421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16005014421 is a deficient number, since it is larger than the sum of its proper divisors (8077767339).

16005014421 is a wasteful number, since it uses less digits than its factorization.

16005014421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16724196.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 16005014421 its reverse (12441050061), we get a palindrome (28446064482).

It can be divided in two parts, 160050 and 14421, that added together give a palindrome (174471).

The spelling of 16005014421 in words is "sixteen billion, five million, fourteen thousand, four hundred twenty-one".