16321016220 has 48 divisors (see below), whose sum is σ = 46151326368. Its totient is φ = 4309177600.

The previous prime is 16321016213. The next prime is 16321016267. The reversal of 16321016220 is 2261012361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1340559 + ... + 1352678.

It is an arithmetic number, because the mean of its divisors is an integer number (961485966).

Almost surely, 2^16321016220 is an apocalyptic number.

16321016220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16321016220 is an abundant number, since it is smaller than the sum of its proper divisors (29830310148).

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

16321016220 is a wasteful number, since it uses less digits than its factorization.

16321016220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693350 (or 2693348 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 16321016220 its reverse (2261012361), we get a palindrome (18582028581).

The spelling of 16321016220 in words is "sixteen billion, three hundred twenty-one million, sixteen thousand, two hundred twenty".