16340221404 has 36 divisors (see below), whose sum is σ = 44481715096. Its totient is φ = 5027760288.

The previous prime is 16340221399. The next prime is 16340221409. The reversal of 16340221404 is 40412204361.

It is a happy number.

16340221404 is a `hidden beast` number, since 1 + 6 + 34 + 0 + 221 + 404 = 666.

It is an interprime number because it is at equal distance from previous prime (16340221399) and next prime (16340221409).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16340221409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17457034 + ... + 17457969.

Almost surely, 2^16340221404 is an apocalyptic number.

It is an amenable number.

16340221404 is an abundant number, since it is smaller than the sum of its proper divisors (28141493692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16340221404 is a wasteful number, since it uses less digits than its factorization.

16340221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34915026 (or 34915021 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 16340221404 its reverse (40412204361), we get a palindrome (56752425765).

The spelling of 16340221404 in words is "sixteen billion, three hundred forty million, two hundred twenty-one thousand, four hundred four".