16621334032 has 20 divisors (see below), whose sum is σ = 32320102636. Its totient is φ = 8280662400.

The previous prime is 16621334017. The next prime is 16621334033. The reversal of 16621334032 is 23043312661.

It can be written as a sum of positive squares in 2 ways, for example, as 6246689296 + 10374644736 = 79036^2 + 101856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16621333985 and 16621334003.

It is not an unprimeable number, because it can be changed into a prime (16621334033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870719 + ... + 1879582.

Almost surely, 2^16621334032 is an apocalyptic number.

It is an amenable number.

16621334032 is a deficient number, since it is larger than the sum of its proper divisors (15698768604).

16621334032 is a wasteful number, since it uses less digits than its factorization.

16621334032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750586 (or 3750580 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 16621334032 its reverse (23043312661), we get a palindrome (39664646693).

The spelling of 16621334032 in words is "sixteen billion, six hundred twenty-one million, three hundred thirty-four thousand, thirty-two".