16620120 has 128 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 4026240.

The previous prime is 16620119. The next prime is 16620137. The reversal of 16620120 is 2102661.

It is a happy number.

16620120 is a `hidden beast` number, since 1 + 662 + 0 + 1 + 2 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 16620093 and 16620102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11181 + ... + 12579.

It is an arithmetic number, because the mean of its divisors is an integer number (472500).

Almost surely, 2^16620120 is an apocalyptic number.

16620120 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 16620120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240000).

16620120 is an abundant number, since it is smaller than the sum of its proper divisors (43859880).

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

16620120 is a wasteful number, since it uses less digits than its factorization.

16620120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16620120 is about 4076.7781396588. The cubic root of 16620120 is about 255.1984614183.

Adding to 16620120 its reverse (2102661), we get a palindrome (18722781).

The spelling of 16620120 in words is "sixteen million, six hundred twenty thousand, one hundred twenty".