16201320 has 64 divisors (see below), whose sum is σ = 49248000. Its totient is φ = 4263168.

The previous prime is 16201303. The next prime is 16201321. The reversal of 16201320 is 2310261.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 16201320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16201321) 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, 8626 + ... + 10334.

It is an arithmetic number, because the mean of its divisors is an integer number (769500).

Almost surely, 2^16201320 is an apocalyptic number.

16201320 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 16201320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24624000).

16201320 is an abundant number, since it is smaller than the sum of its proper divisors (33046680).

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

16201320 is a wasteful number, since it uses less digits than its factorization.

16201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 16201320 is about 4025.0863344778. The cubic root of 16201320 is about 253.0366718182.

Adding to 16201320 its reverse (2310261), we get a palindrome (18511581).

The spelling of 16201320 in words is "sixteen million, two hundred one thousand, three hundred twenty".