16021800 has 240 divisors, whose sum is σ = 59415840. Its totient is φ = 3991680.

The previous prime is 16021771. The next prime is 16021829. The reversal of 16021800 is 812061.

16021800 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16021771) and next prime (16021829).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 372579 + ... + 372621.

It is an arithmetic number, because the mean of its divisors is an integer number (247566).

Almost surely, 2^16021800 is an apocalyptic number.

16021800 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 16021800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29707920).

16021800 is an abundant number, since it is smaller than the sum of its proper divisors (43394040).

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

16021800 is a wasteful number, since it uses less digits than its factorization.

16021800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 16021800 is about 4002.7240724287. The cubic root of 16021800 is about 252.0986008709.

Adding to 16021800 its reverse (812061), we get a palindrome (16833861).

The spelling of 16021800 in words is "sixteen million, twenty-one thousand, eight hundred".