16240434421 has 8 divisors (see below), whose sum is σ = 16351753824. Its totient is φ = 16129257840.

The previous prime is 16240434367. The next prime is 16240434443. The reversal of 16240434421 is 12443404261.

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

It is a cyclic number.

It is not a de Polignac number, because 16240434421 - 2⁷ = 16240434293 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 (16240434451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197691 + ... + 267511.

It is an arithmetic number, because the mean of its divisors is an integer number (2043969228).

Almost surely, 2^16240434421 is an apocalyptic number.

It is an amenable number.

16240434421 is a deficient number, since it is larger than the sum of its proper divisors (111319403).

16240434421 is a wasteful number, since it uses less digits than its factorization.

16240434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71411.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 16240434421 its reverse (12443404261), we get a palindrome (28683838682).

The spelling of 16240434421 in words is "sixteen billion, two hundred forty million, four hundred thirty-four thousand, four hundred twenty-one".