16857223720 has 64 divisors (see below), whose sum is σ = 38126039040. Its totient is φ = 6707904000.

The previous prime is 16857223709. The next prime is 16857223751. The reversal of 16857223720 is 2732275861.

It is a super-2 number, since 2×16857223720² (a number of 21 digits) contains 22 as substring.

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, 12936589 + ... + 12937891.

It is an arithmetic number, because the mean of its divisors is an integer number (595719360).

Almost surely, 2^16857223720 is an apocalyptic number.

16857223720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16857223720 is an abundant number, since it is smaller than the sum of its proper divisors (21268815320).

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

16857223720 is a wasteful number, since it uses less digits than its factorization.

16857223720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746 (or 2742 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 16857223720 in words is "sixteen billion, eight hundred fifty-seven million, two hundred twenty-three thousand, seven hundred twenty".