16651916220 has 48 divisors (see below), whose sum is σ = 46710695808. Its totient is φ = 4432384320.

The previous prime is 16651916207. The next prime is 16651916227. The reversal of 16651916220 is 2261915661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651916227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220866 + ... + 286505.

It is an arithmetic number, because the mean of its divisors is an integer number (973139496).

Almost surely, 2^16651916220 is an apocalyptic number.

16651916220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16651916220 is an abundant number, since it is smaller than the sum of its proper divisors (30058779588).

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

16651916220 is a wasteful number, since it uses less digits than its factorization.

16651916220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507930 (or 507928 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 16651916220 in words is "sixteen billion, six hundred fifty-one million, nine hundred sixteen thousand, two hundred twenty".