16421700000 has 576 divisors, whose sum is σ = 58901230080. Its totient is φ = 3991680000.

The previous prime is 16421699977. The next prime is 16421700037. The reversal of 16421700000 is 712461.

It is a self number, because there is not a number n which added to its sum of digits gives 16421700000.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 245099967 + ... + 245100033.

It is an arithmetic number, because the mean of its divisors is an integer number (102259080).

Almost surely, 2^16421700000 is an apocalyptic number.

16421700000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16421700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29450615040).

16421700000 is an abundant number, since it is smaller than the sum of its proper divisors (42479530080).

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

16421700000 is an equidigital number, since it uses as much as digits as its factorization.

16421700000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The spelling of 16421700000 in words is "sixteen billion, four hundred twenty-one million, seven hundred thousand".