16621432234 has 16 divisors (see below), whose sum is σ = 27241834176. Its totient is φ = 7543216800.

The previous prime is 16621432231. The next prime is 16621432249. The reversal of 16621432234 is 43223412661.

16621432234 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16621432234.

It is not an unprimeable number, because it can be changed into a prime (16621432231) 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 7 ways as a sum of consecutive naturals, for example, 584787 + ... + 612550.

It is an arithmetic number, because the mean of its divisors is an integer number (1702614636).

Almost surely, 2^16621432234 is an apocalyptic number.

16621432234 is a deficient number, since it is larger than the sum of its proper divisors (10620401942).

16621432234 is a wasteful number, since it uses less digits than its factorization.

16621432234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197981.

The product of its digits is 41472, while the sum is 34.

Adding to 16621432234 its reverse (43223412661), we get a palindrome (59844844895).

The spelling of 16621432234 in words is "sixteen billion, six hundred twenty-one million, four hundred thirty-two thousand, two hundred thirty-four".