16620030 has 192 divisors, whose sum is σ = 54632448. Its totient is φ = 3421440.

The previous prime is 16620017. The next prime is 16620049. The reversal of 16620030 is 3002661.

It is a happy number.

16620030 is a `hidden beast` number, since 1 + 662 + 0 + 0 + 3 + 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 = 16619985 and 16620012.

It is a congruent number.

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, 449172 + ... + 449208.

It is an arithmetic number, because the mean of its divisors is an integer number (284544).

Almost surely, 2^16620030 is an apocalyptic number.

16620030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16620030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27316224).

16620030 is an abundant number, since it is smaller than the sum of its proper divisors (38012418).

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

16620030 is a wasteful number, since it uses less digits than its factorization.

16620030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 16620030 is about 4076.7671015156. The cubic root of 16620030 is about 255.1980007738.

Adding to 16620030 its reverse (3002661), we get a palindrome (19622691).

The spelling of 16620030 in words is "sixteen million, six hundred twenty thousand, thirty".